feat: support speech to speech translation in Gemini Live

PiperOrigin-RevId: 914523879

Author: yinghsienwu

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "2.2.0"
+  ".": "2.1.0"
 }

CHANGELOG.md

@@ -2,13 +2,6 @@
 
 
 
-## [2.2.0](https://github.com/googleapis/js-genai/compare/v2.1.0...v2.2.0) (2026-05-12)
-
-
-### Features
-
-* Added missing FunctionCallResultDelta type and `arguments` field to the ArgumentDelta type ([f76138b](https://github.com/googleapis/js-genai/commit/f76138b5368fa3f6418e84214493fb874e748fea))
-
 ## [2.1.0](https://github.com/googleapis/js-genai/compare/v2.0.1...v2.1.0) (2026-05-12)
 
 

api-report/genai-node.api.md

@@ -2487,6 +2487,7 @@ export interface LiveConnectConfig {
     seed?: number;
     sessionResumption?: SessionResumptionConfig;
     speechConfig?: SpeechConfig;
+    streamTranslationConfig?: StreamTranslationConfig;
     systemInstruction?: ContentUnion;
     temperature?: number;
     thinkingConfig?: ThinkingConfig;
@@ -3541,6 +3542,12 @@ export interface StreamableHttpTransport {
     url?: string;
 }
 
+// @public
+export interface StreamTranslationConfig {
+    echoTargetLanguage?: boolean;
+    targetLanguageCode?: string;
+}
+
 // @public
 export interface StringList {
     values?: string[];

api-report/genai-web.api.md

@@ -2487,6 +2487,7 @@ export interface LiveConnectConfig {
     seed?: number;
     sessionResumption?: SessionResumptionConfig;
     speechConfig?: SpeechConfig;
+    streamTranslationConfig?: StreamTranslationConfig;
     systemInstruction?: ContentUnion;
     temperature?: number;
     thinkingConfig?: ThinkingConfig;
@@ -3541,6 +3542,12 @@ export interface StreamableHttpTransport {
     url?: string;
 }
 
+// @public
+export interface StreamTranslationConfig {
+    echoTargetLanguage?: boolean;
+    targetLanguageCode?: string;
+}
+
 // @public
 export interface StringList {
     values?: string[];

api-report/genai.api.md

@@ -2487,6 +2487,7 @@ export interface LiveConnectConfig {
     seed?: number;
     sessionResumption?: SessionResumptionConfig;
     speechConfig?: SpeechConfig;
+    streamTranslationConfig?: StreamTranslationConfig;
     systemInstruction?: ContentUnion;
     temperature?: number;
     thinkingConfig?: ThinkingConfig;
@@ -3541,6 +3542,12 @@ export interface StreamableHttpTransport {
     url?: string;
 }
 
+// @public
+export interface StreamTranslationConfig {
+    echoTargetLanguage?: boolean;
+    targetLanguageCode?: string;
+}
+
 // @public
 export interface StringList {
     values?: string[];

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@google/genai",
-  "version": "2.2.0",
+  "version": "2.1.0",
   "description": "",
   "type": "module",
   "main": "dist/node/index.mjs",

package.json

@@ -18,7 +18,7 @@ const CONTENT_TYPE_HEADER = 'Content-Type';
 const SERVER_TIMEOUT_HEADER = 'X-Server-Timeout';
 const USER_AGENT_HEADER = 'User-Agent';
 export const GOOGLE_API_CLIENT_HEADER = 'x-goog-api-client';
-export const SDK_VERSION = '2.2.0'; // x-release-please-version
+export const SDK_VERSION = '2.1.0'; // x-release-please-version
 const LIBRARY_LABEL = `google-genai-sdk/${SDK_VERSION}`;
 const VERTEX_AI_API_DEFAULT_VERSION = 'v1beta1';
 const GOOGLE_AI_API_DEFAULT_VERSION = 'v1beta';

src/_api_client.ts

@@ -1170,6 +1170,17 @@ export function liveConnectConfigToMldev(
     );
   }
 
+  const fromStreamTranslationConfig = common.getValueByPath(fromObject, [
+    'streamTranslationConfig',
+  ]);
+  if (parentObject !== undefined && fromStreamTranslationConfig != null) {
+    common.setValueByPath(
+      parentObject,
+      ['setup', 'generationConfig', 'streamTranslationConfig'],
+      fromStreamTranslationConfig,
+    );
+  }
+
   return toObject;
 }
 
@@ -1413,6 +1424,14 @@ export function liveConnectConfigToVertex(
     );
   }
 
+  if (
+    common.getValueByPath(fromObject, ['streamTranslationConfig']) !== undefined
+  ) {
+    throw new Error(
+      'streamTranslationConfig parameter is only supported in Gemini Developer API mode, not in Gemini Enterprise Agent Platform mode.',
+    );
+  }
+
   return toObject;
 }
 

src/converters/_live_converters.ts

@@ -558,6 +558,17 @@ export function liveConnectConfigToMldev(
     );
   }
 
+  const fromStreamTranslationConfig = common.getValueByPath(fromObject, [
+    'streamTranslationConfig',
+  ]);
+  if (parentObject !== undefined && fromStreamTranslationConfig != null) {
+    common.setValueByPath(
+      parentObject,
+      ['setup', 'generationConfig', 'streamTranslationConfig'],
+      fromStreamTranslationConfig,
+    );
+  }
+
   return toObject;
 }