diff --git a/packages/devextreme/js/__internal/grids/grid_core/ai_assistant/__tests__/ai_assistant_controller.test.ts b/packages/devextreme/js/__internal/grids/grid_core/ai_assistant/__tests__/ai_assistant_controller.test.ts
index 055bcd16fb57..92b798771f41 100644
--- a/packages/devextreme/js/__internal/grids/grid_core/ai_assistant/__tests__/ai_assistant_controller.test.ts
+++ b/packages/devextreme/js/__internal/grids/grid_core/ai_assistant/__tests__/ai_assistant_controller.test.ts
@@ -312,7 +312,7 @@ describe('AIAssistantController', () => {
           status: MessageStatus.Failure,
           headerText: 'Failed to process request',
           text: MessageStatus.Failure,
-          errorText: 'Network error',
+          errorText: 'Invalid response from the AI service. Please try again.',
         }),
       ]);
 
@@ -342,11 +342,11 @@ describe('AIAssistantController', () => {
           status: MessageStatus.Failure,
           headerText: 'Failed to process request',
           text: MessageStatus.Failure,
-          errorText: 'Default error message',
+          errorText: 'Invalid response from the AI service. Please try again.',
         }),
       ]);
 
-      await expect(promise).rejects.toThrow('Default error message');
+      await expect(promise).rejects.toThrow('Invalid response from the AI service. Please try again.');
     });
 
     it('should fail message when response has empty actions array', async () => {
@@ -368,11 +368,11 @@ describe('AIAssistantController', () => {
       expect(messages).toEqual([
         expect.objectContaining({
           status: MessageStatus.Failure,
-          errorText: 'Default error message',
+          errorText: 'Invalid response from the AI service. Please try again.',
         }),
       ]);
 
-      await expect(promise).rejects.toThrow('Default error message');
+      await expect(promise).rejects.toThrow('Invalid response from the AI service. Please try again.');
     });
 
     it('should fail message when validation fails', async () => {
@@ -406,11 +406,11 @@ describe('AIAssistantController', () => {
       expect(messages).toEqual([
         expect.objectContaining({
           status: MessageStatus.Failure,
-          errorText: 'Received invalid commands',
+          errorText: 'Invalid response from the AI service. Please try again.',
         }),
       ]);
 
-      await expect(promise).rejects.toThrow('Received invalid commands');
+      await expect(promise).rejects.toThrow('Invalid response from the AI service. Please try again.');
     });
 
     it('should fail message when commands are already executing', async () => {
@@ -444,11 +444,11 @@ describe('AIAssistantController', () => {
       expect(messages).toEqual([
         expect.objectContaining({
           status: MessageStatus.Failure,
-          errorText: 'Unexpected error',
+          errorText: 'Execution already in progress. Please wait.',
         }),
       ]);
 
-      await expect(promise).rejects.toThrow('Unexpected error');
+      await expect(promise).rejects.toThrow('Execution already in progress. Please wait.');
     });
 
     it('should fail message when buildResponseSchema returns falsy', async () => {
@@ -477,11 +477,11 @@ describe('AIAssistantController', () => {
       expect(messages).toEqual([
         expect.objectContaining({
           status: MessageStatus.Failure,
-          errorText: 'Grid commands not initialized',
+          errorText: 'An unexpected error occurred. Please try again.',
         }),
       ]);
 
-      await expect(promise).rejects.toThrow('Grid commands not initialized');
+      await expect(promise).rejects.toThrow('An unexpected error occurred. Please try again.');
     });
 
     it('should resolve promise when command succeeds', async () => {
@@ -524,7 +524,7 @@ describe('AIAssistantController', () => {
 
       sendRequestCallbacks.onComplete?.({} as ExecuteGridAssistantCommandResult);
 
-      await expect(promise).rejects.toThrow('Default error message');
+      await expect(promise).rejects.toThrow('Invalid response from the AI service. Please try again.');
     });
 
     it('should reject second request while first request is still processing', async () => {
@@ -553,7 +553,7 @@ describe('AIAssistantController', () => {
       };
       expect(integrationInstance.sendRequest).toHaveBeenCalledTimes(1);
 
-      await expect(secondPromise).rejects.toBeUndefined();
+      await expect(secondPromise).rejects.toThrow('Request already in progress. Please wait.');
     });
 
     it('should accept new request after previous request completes successfully', async () => {
@@ -1003,7 +1003,7 @@ describe('AIAssistantController', () => {
       const regeneratePromise = controller.sendRequestToAI(aiMessage);
       regeneratePromise.catch(() => {});
 
-      await expect(regeneratePromise).rejects.toBeUndefined();
+      await expect(regeneratePromise).rejects.toThrow('Request already in progress. Please wait.');
     });
   });
 });
diff --git a/packages/devextreme/js/__internal/grids/grid_core/ai_assistant/__tests__/ai_assistant_view_controller.integration.test.ts b/packages/devextreme/js/__internal/grids/grid_core/ai_assistant/__tests__/ai_assistant_view_controller.integration.test.ts
index dcb726a4a1ee..a9b0e4e27484 100644
--- a/packages/devextreme/js/__internal/grids/grid_core/ai_assistant/__tests__/ai_assistant_view_controller.integration.test.ts
+++ b/packages/devextreme/js/__internal/grids/grid_core/ai_assistant/__tests__/ai_assistant_view_controller.integration.test.ts
@@ -290,7 +290,7 @@ describe('AIAssistantViewController', () => {
       expect($messages.length).toBe(1);
       expect(getMessageStatusClass($messages.eq(0))).toBe(MessageStatus.Failure);
       expect($messages.eq(0).find(`.${CLASSES.messageErrorText}`).text())
-        .toBe('Network error');
+        .toBe('Invalid response from the AI service. Please try again.');
     });
 
     it('should render multiple messages with correct statuses after sequential requests', async () => {
diff --git a/packages/devextreme/js/__internal/grids/grid_core/ai_assistant/ai_assistant_controller.ts b/packages/devextreme/js/__internal/grids/grid_core/ai_assistant/ai_assistant_controller.ts
index ac8f250107f9..c61f3d03553b 100644
--- a/packages/devextreme/js/__internal/grids/grid_core/ai_assistant/ai_assistant_controller.ts
+++ b/packages/devextreme/js/__internal/grids/grid_core/ai_assistant/ai_assistant_controller.ts
@@ -75,24 +75,25 @@ export class AIAssistantController extends Controller {
 
   private processResponse(response: ExecuteGridAssistantCommandResult): Promise<CommandResult[]> {
     if (this.gridCommands?.isExecuting()) {
-      // TODO: need to localize default error message if execution is in progress
-      return Promise.reject(new Error('Unexpected error'));
+      const localizedErrorMsg = messageLocalization.format('dxDataGrid-aiAssistantExecutionInProgressMessage');
+      return Promise.reject(new Error(localizedErrorMsg));
     }
 
     if (!response?.actions || !Array.isArray(response.actions) || !response.actions.length) {
-      // TODO: need to localize default error message when there are no commands
-      return Promise.reject(new Error('Default error message'));
+      const localizedErrorMsg = messageLocalization.format('dxDataGrid-aiAssistantInvalidResponseMessage');
+      return Promise.reject(new Error(localizedErrorMsg));
     }
 
     if (!this.gridCommands?.validate(response.actions)) {
-      // TODO: need to localize error message on validation fail
-      return Promise.reject(new Error('Received invalid commands'));
+      const localizedErrorMsg = messageLocalization.format('dxDataGrid-aiAssistantInvalidResponseMessage');
+      return Promise.reject(new Error(localizedErrorMsg));
     }
 
     const customizeResponseText = this.option('aiAssistant.customizeResponseText');
+    const notInitializedErrorMsg = messageLocalization.format('dxDataGrid-aiAssistantUnexpectedErrorMessage');
 
     return this.gridCommands?.executeCommands(response.actions, customizeResponseText)
-      ?? Promise.reject(new Error('Grid commands not initialized'));
+      ?? Promise.reject(new Error(notInitializedErrorMsg));
   }
 
   private createPendingAIMessage(message: Message): AIMessage {
@@ -177,8 +178,8 @@ export class AIAssistantController extends Controller {
       const responseSchema = this.gridCommands?.buildResponseSchema();
 
       if (!responseSchema) {
-        // TODO: Change error message
-        const error = new Error('Grid commands not initialized');
+        const localizedErrorMsg = messageLocalization.format('dxDataGrid-aiAssistantUnexpectedErrorMessage');
+        const error = new Error(localizedErrorMsg);
 
         this.failAIMessage(aiMessage.id, error);
         reject(error);
@@ -198,7 +199,6 @@ export class AIAssistantController extends Controller {
                 resolve();
               })
               .fail((errorMessage) => {
-                // TODO: Change error message
                 const error = errorMessage instanceof Error
                   ? errorMessage
                   : new Error(String(errorMessage));
@@ -208,8 +208,9 @@ export class AIAssistantController extends Controller {
               });
           },
           onError: (error: Error): void => {
-            // TODO: Change error message
-            this.failAIMessage(aiMessage.id, error);
+            const localizedErrorMsg = messageLocalization.format('dxDataGrid-aiAssistantInvalidResponseMessage');
+
+            this.failAIMessage(aiMessage.id, new Error(localizedErrorMsg));
             reject(error);
           },
           onAbort: (): void => {
@@ -244,8 +245,8 @@ export class AIAssistantController extends Controller {
 
   public sendRequestToAI(message: Message | AIMessage): Promise<void> {
     if (this.processing) {
-      // TODO: need to add localization message when a request is already processing
-      return Promise.reject();
+      const localizedErrorMsg = messageLocalization.format('dxDataGrid-aiAssistantRequestInProgressMessage');
+      return Promise.reject(new Error(localizedErrorMsg));
     }
 
     if (isAIMessage(message)) {
diff --git a/packages/devextreme/js/localization/messages/ar.json b/packages/devextreme/js/localization/messages/ar.json
index 00d58aea3174..a999dcdbdf8a 100644
--- a/packages/devextreme/js/localization/messages/ar.json
+++ b/packages/devextreme/js/localization/messages/ar.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/bg.json b/packages/devextreme/js/localization/messages/bg.json
index 63be264f389f..2d8a1e837d2e 100644
--- a/packages/devextreme/js/localization/messages/bg.json
+++ b/packages/devextreme/js/localization/messages/bg.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/ca.json b/packages/devextreme/js/localization/messages/ca.json
index d12b14a1db35..a23f7efc103b 100644
--- a/packages/devextreme/js/localization/messages/ca.json
+++ b/packages/devextreme/js/localization/messages/ca.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/cs.json b/packages/devextreme/js/localization/messages/cs.json
index 4c322e9f45f3..f01fa786179c 100644
--- a/packages/devextreme/js/localization/messages/cs.json
+++ b/packages/devextreme/js/localization/messages/cs.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/da.json b/packages/devextreme/js/localization/messages/da.json
index 239dcce4e459..73c2e4cf758d 100644
--- a/packages/devextreme/js/localization/messages/da.json
+++ b/packages/devextreme/js/localization/messages/da.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/de.json b/packages/devextreme/js/localization/messages/de.json
index a0dbd85dda1d..6399698c0e3a 100644
--- a/packages/devextreme/js/localization/messages/de.json
+++ b/packages/devextreme/js/localization/messages/de.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/el.json b/packages/devextreme/js/localization/messages/el.json
index 040711e41726..bd3f2dd3fcf4 100644
--- a/packages/devextreme/js/localization/messages/el.json
+++ b/packages/devextreme/js/localization/messages/el.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/en.json b/packages/devextreme/js/localization/messages/en.json
index 48767cc1875a..e226784a1f5f 100644
--- a/packages/devextreme/js/localization/messages/en.json
+++ b/packages/devextreme/js/localization/messages/en.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/es.json b/packages/devextreme/js/localization/messages/es.json
index 15e18624b85c..7a40cab2c41d 100644
--- a/packages/devextreme/js/localization/messages/es.json
+++ b/packages/devextreme/js/localization/messages/es.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/fa.json b/packages/devextreme/js/localization/messages/fa.json
index 9c3a7f2cfb11..bfd5b1a6bc2f 100644
--- a/packages/devextreme/js/localization/messages/fa.json
+++ b/packages/devextreme/js/localization/messages/fa.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/fi.json b/packages/devextreme/js/localization/messages/fi.json
index 82811ab13aee..ecf26f46f6cf 100644
--- a/packages/devextreme/js/localization/messages/fi.json
+++ b/packages/devextreme/js/localization/messages/fi.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/fr.json b/packages/devextreme/js/localization/messages/fr.json
index 8e2568e5c423..e10b8753e59c 100644
--- a/packages/devextreme/js/localization/messages/fr.json
+++ b/packages/devextreme/js/localization/messages/fr.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/hu.json b/packages/devextreme/js/localization/messages/hu.json
index 9bc2e433e785..b72c9de4e1a9 100644
--- a/packages/devextreme/js/localization/messages/hu.json
+++ b/packages/devextreme/js/localization/messages/hu.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/it.json b/packages/devextreme/js/localization/messages/it.json
index 8ec0f2c46c68..c8b7c1e1588a 100644
--- a/packages/devextreme/js/localization/messages/it.json
+++ b/packages/devextreme/js/localization/messages/it.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/ja.json b/packages/devextreme/js/localization/messages/ja.json
index d431777e7ccc..d5fdf68a8cdc 100644
--- a/packages/devextreme/js/localization/messages/ja.json
+++ b/packages/devextreme/js/localization/messages/ja.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/ko.json b/packages/devextreme/js/localization/messages/ko.json
index c296f3232a57..b6b4fe295e83 100644
--- a/packages/devextreme/js/localization/messages/ko.json
+++ b/packages/devextreme/js/localization/messages/ko.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/lt.json b/packages/devextreme/js/localization/messages/lt.json
index 2e7217b60ed9..2a2e00e26773 100644
--- a/packages/devextreme/js/localization/messages/lt.json
+++ b/packages/devextreme/js/localization/messages/lt.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/lv.json b/packages/devextreme/js/localization/messages/lv.json
index c52837c79ab7..8a2cb349b622 100644
--- a/packages/devextreme/js/localization/messages/lv.json
+++ b/packages/devextreme/js/localization/messages/lv.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/nb.json b/packages/devextreme/js/localization/messages/nb.json
index 9e06c8d9c114..5686609ffc0b 100644
--- a/packages/devextreme/js/localization/messages/nb.json
+++ b/packages/devextreme/js/localization/messages/nb.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/nl.json b/packages/devextreme/js/localization/messages/nl.json
index 5f927597e57a..1b18e8a21c08 100644
--- a/packages/devextreme/js/localization/messages/nl.json
+++ b/packages/devextreme/js/localization/messages/nl.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/pl.json b/packages/devextreme/js/localization/messages/pl.json
index cde4118eedaf..4e12d84a9a40 100644
--- a/packages/devextreme/js/localization/messages/pl.json
+++ b/packages/devextreme/js/localization/messages/pl.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/pt.json b/packages/devextreme/js/localization/messages/pt.json
index 3386d7ec4275..133f403b4704 100644
--- a/packages/devextreme/js/localization/messages/pt.json
+++ b/packages/devextreme/js/localization/messages/pt.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/ro.json b/packages/devextreme/js/localization/messages/ro.json
index 66e8444fbecc..adfabe1bdfce 100644
--- a/packages/devextreme/js/localization/messages/ro.json
+++ b/packages/devextreme/js/localization/messages/ro.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/ru.json b/packages/devextreme/js/localization/messages/ru.json
index 46daab0f41a5..65cff548ecd4 100644
--- a/packages/devextreme/js/localization/messages/ru.json
+++ b/packages/devextreme/js/localization/messages/ru.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/sl.json b/packages/devextreme/js/localization/messages/sl.json
index 765571a6cf99..4ca9d7b4fa7f 100644
--- a/packages/devextreme/js/localization/messages/sl.json
+++ b/packages/devextreme/js/localization/messages/sl.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/sv.json b/packages/devextreme/js/localization/messages/sv.json
index 9e188b6a640c..13d512fa9faf 100644
--- a/packages/devextreme/js/localization/messages/sv.json
+++ b/packages/devextreme/js/localization/messages/sv.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/tr.json b/packages/devextreme/js/localization/messages/tr.json
index 0e4db56bb626..47e444777110 100644
--- a/packages/devextreme/js/localization/messages/tr.json
+++ b/packages/devextreme/js/localization/messages/tr.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/uk.json b/packages/devextreme/js/localization/messages/uk.json
index 5081d10fa70b..58852ddc82aa 100644
--- a/packages/devextreme/js/localization/messages/uk.json
+++ b/packages/devextreme/js/localization/messages/uk.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/vi.json b/packages/devextreme/js/localization/messages/vi.json
index 60d01f264d1d..204dc0cb60fb 100644
--- a/packages/devextreme/js/localization/messages/vi.json
+++ b/packages/devextreme/js/localization/messages/vi.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/zh-tw.json b/packages/devextreme/js/localization/messages/zh-tw.json
index da0b82a6e949..1d568e8a17a9 100644
--- a/packages/devextreme/js/localization/messages/zh-tw.json
+++ b/packages/devextreme/js/localization/messages/zh-tw.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",
diff --git a/packages/devextreme/js/localization/messages/zh.json b/packages/devextreme/js/localization/messages/zh.json
index a0d1ee585932..d5ac6c21c906 100644
--- a/packages/devextreme/js/localization/messages/zh.json
+++ b/packages/devextreme/js/localization/messages/zh.json
@@ -115,6 +115,10 @@
         "dxDataGrid-aiAssistantSuccessMessage": "Success",
         "dxDataGrid-aiAssistantErrorMessage": "Error",
         "dxDataGrid-aiAssistantExecutionAbortMessage": "Execution Interrupted",
+        "dxDataGrid-aiAssistantExecutionInProgressMessage": "Execution already in progress. Please wait.",
+        "dxDataGrid-aiAssistantRequestInProgressMessage": "Request already in progress. Please wait.",
+        "dxDataGrid-aiAssistantUnexpectedErrorMessage": "An unexpected error occurred. Please try again.",
+        "dxDataGrid-aiAssistantInvalidResponseMessage": "Invalid response from the AI service. Please try again.",
         "dxDataGrid-aiAssistantClearButtonText": "Clear",
         "dxDataGrid-aiAssistantRegenerateButtonText": "Regenerate",
         "dxDataGrid-aiAssistantAbortConfirmText": "Closing the AI Assistant chat aborts requests in progress. Would you like to close the chat?",