Voice wizard: Use test message in tts language (#22882)

* Voice wizard: Use test message in tts language

* catch none existing lang

src/dialogs/voice-assistant-setup/voice-assistant-setup-step-success.ts

@@ -24,6 +24,7 @@ import "../../panels/lovelace/entity-rows/hui-select-entity-row";
 import type { HomeAssistant } from "../../types";
 import { AssistantSetupStyles } from "./styles";
 import { STEP } from "./voice-assistant-setup-dialog";
+import { getTranslation } from "../../util/common-translation";
 
 @customElement("ha-voice-assistant-setup-step-success")
 export class HaVoiceAssistantSetupStepSuccess extends LitElement {
@@ -213,8 +214,24 @@ export class HaVoiceAssistantSetupStepSuccess extends LitElement {
     });
   }
 
-  private _testTts() {
+  private async _testTts() {
-    this._announce("Hello, how can I help you?");
+    const [pipeline] = await this._getPipeline();
+
+    if (!pipeline) {
+      return;
+    }
+
+    if (pipeline.language !== this.hass.locale.language) {
+      try {
+        const result = await getTranslation(null, pipeline.language, false);
+        this._announce(result.data["ui.dialogs.tts-try.message_example"]);
+        return;
+      } catch (e) {
+        // ignore fallback to user language
+      }
+    }
+
+    this._announce(this.hass.localize("ui.dialogs.tts-try.message_example"));
   }
 
   private async _announce(message: string) {

src/util/common-translation.ts

@@ -135,14 +135,15 @@ export function getLocalLanguage() {
 
 export async function getTranslation(
   fragment: string | null,
-  language: string
+  language: string,
+  fallback = true
 ) {
   const metadata = translationMetadata.translations[language];
   if (!metadata?.hash) {
-    if (language !== "en") {
+    if (fallback && language !== "en") {
       return getTranslation(fragment, "en");
     }
-    throw new Error("Language en is not found in metadata");
+    throw new Error(`Language '${language}' is not found in metadata`);
   }
 
   // nl-abcd.jon or logbook/nl-abcd.json