feat: Add translation_config SDK support for GEAP.

PiperOrigin-RevId: 971644297

Author: google-genai-bot

src/converters/_live_converters.ts

@@ -1507,9 +1507,14 @@ export function liveConnectConfigToVertex(
     );
   }
 
-  if (common.getValueByPath(fromObject, ['translationConfig']) !== undefined) {
-    throw new Error(
-      'translationConfig parameter is only supported in Gemini Developer API mode, not in Gemini Enterprise Agent Platform mode.',
+  const fromTranslationConfig = common.getValueByPath(fromObject, [
+    'translationConfig',
+  ]);
+  if (parentObject !== undefined && fromTranslationConfig != null) {
+    common.setValueByPath(
+      parentObject,
+      ['setup', 'generationConfig', 'translationConfig'],
+      fromTranslationConfig,
     );
   }
 

src/types.ts

@@ -4766,9 +4766,9 @@ export class ResponseFormat {
 
 /** Config for stream translation. */
 export declare interface TranslationConfig {
-  /** Optional. If true, the model will generate audio when the target language is spoken, essentially it will parrot the input. If false, we will not produce audio for the target language. */
+  /** If true, the model will generate audio when the target language is spoken, essentially it will parrot the input. If false, we will not produce audio for the target language. */
   echoTargetLanguage?: boolean;
-  /** Required. The target language for translation. Supported values are BCP-47 language codes (e.g. "en", "es", "fr"). */
+  /** The target language for translation. Supported values are BCP-47 language codes (e.g. "en", "es", "fr"). */
   targetLanguageCode?: string;
 }