set language property on TranslationRecognitionEventArgs (#736)

src/common.speech/ServiceMessages/TranslationHypothesis.ts

@@ -2,13 +2,14 @@
 // Licensed under the MIT license.
 
 import { Contracts } from "../../sdk/Contracts";
-import { ITranslations } from "../Exports";
+import { IPrimaryLanguage, ITranslations } from "../Exports";
 import { TranslationStatus } from "../TranslationStatus";
 
 // translation.hypothesis
 export interface ITranslationHypothesis {
     Duration: number;
     Offset: number;
+    PrimaryLanguage?: IPrimaryLanguage;
     Text: string;
     Translation: ITranslations;
 }
@@ -48,4 +49,8 @@ export class TranslationHypothesis implements ITranslationHypothesis {
     public get Translation(): ITranslations {
         return this.privTranslationHypothesis.Translation;
     }
+
+    public get Language(): string {
+        return this.privTranslationHypothesis.PrimaryLanguage?.Language;
+    }
 }

src/common.speech/TranslationServiceRecognizer.ts

@@ -336,7 +336,6 @@ export class TranslationServiceRecognizer extends ConversationServiceRecognizer
         }
 
         let resultReason: ResultReason;
-        let language: string;
         let confidence: string;
         if (serviceResult instanceof TranslationPhrase) {
             if (!!serviceResult.Translation && serviceResult.Translation.TranslationStatus === TranslationStatus.Success) {
@@ -344,11 +343,11 @@ export class TranslationServiceRecognizer extends ConversationServiceRecognizer
             } else {
                 resultReason = ResultReason.RecognizedSpeech;
             }
-            language = serviceResult.Language;
             confidence = serviceResult.Confidence;
         } else {
             resultReason = ResultReason.TranslatingSpeech;
         }
+        const language = serviceResult.Language;
 
         const offset: number = serviceResult.Offset + this.privRequestSession.currentTurnAudioOffset;
 

tests/AutoSourceLangDetectionTests.ts

@@ -492,6 +492,8 @@ describe.each([true, false])("Service based tests", (forceNodeWebSocket: boolean
             expect(e.result.translations).not.toBeUndefined();
             expect(e.result.translations.languages[0]).toEqual(defaultTargetLanguage);
             expect(e.result.translations.get(defaultTargetLanguage)).toContain("Wie ist das");
+            expect(e.result.language).not.toBeUndefined();
+            expect(e.result.language).toEqual("en-US");
         }
 
         r.recognized = (o: sdk.Recognizer, e: sdk.TranslationRecognitionEventArgs) => {