DialogFlow更改识别语言

Question

I'm building a multi-language-educational app on DialogFlow. and i hit a big problem : Switch recognition language. Any suggestions how could i achieve that or any other approaches?

I have added to DialogFlow web-interface secondary language.

I'm using action-on-google sdk with node.js webhook.

UPDATE :

 let responseToUser = {
    //fulfillmentMessages: richResponsesV2, // Optional, uncomment to enable
    //outputContexts: [{ 'name': `${session}/contexts/weather`, 'lifespanCount': 2, 'parameters': {'city': 'Rome'} }], // Optional, uncomment to enable
    fulfillmentText: 'This is from Dialogflow\'s Cloud Functions for Firebase editor! :-)', // displayed response
    payload: {
       audioConfig : {
        "audioEncoding": 'AUDIO_ENCODING_FLAC',
        "sampleRateHertz": 16000,
        "languageCode": 'de',
        "phraseHints": ["gutten tag"]
       }
    },
      function sendResponse (responseToUser) {
// if the response is a string send it as a response to the user
if (typeof responseToUser === 'string') {
  let responseJson = {fulfillmentText: responseToUser}; // displayed response
  response.json(responseJson); // Send response to Dialogflow
} else {
  // If the response to the user includes rich responses or contexts send them to Dialogflow
  let responseJson = {};
  // Define the text response
  responseJson.fulfillmentText = responseToUser.fulfillmentText;
  responseJson.payload = responseToUser.payload;

     // Send the response to Dialogflow
  console.log('Response to Dialogflow: ' + JSON.stringify(responseJson));
  response.json(responseJson);

The request json :

{
  "responseId": "c4ea35d3-1455-4142-b7d2-22417c5880ae",
  "queryResult": {
"queryText": "hi",
"action": "default",
"parameters": {},
"allRequiredParamsPresent": true,
"fulfillmentText": "This is from Dialogflow's Cloud Functions for Firebase editor! :-)",
"fulfillmentMessages": [
  {
    "text": {
      "text": [
        "This is from Dialogflow's Cloud Functions for Firebase editor! :-)"
      ]
    }
  }
],
"webhookPayload": {
  "sampleRateHertz": 16000,
  "languageCode": "de",
  "phraseHints": [
    "gutten tag"
  ],
  "audioEncoding": "AUDIO_ENCODING_FLAC"
},
"outputContexts": [
  {
    "name": "projects/homehf-master/agent/sessions/824b34b9-45f8-4c65-9377-a31242d3414b/contexts/test_context",
    "lifespanCount": 5
  }
],
"intent": {
  "name": "projects/homehf-master/agent/intents/0259f134-6d4d-4aed-920d-9240adbe38fe",
  "displayName": "starter_intent"
},
"intentDetectionConfidence": 0.75,
"diagnosticInfo": {
  "webhook_latency_ms": 44
},
"languageCode": "en"
 },
    "webhookStatus": {
     "message": "Webhook execution successful"
  }
 }

Answer 1

Dialogflow requires a language with the audio request , if you'd like to change that language you'll need to issue a new request. You can implement some logic in your webhook and frontend to try the request again with a different language.

To do this add some data in the payload field of your webhook response response indicating that you'd like to issues a new request with the a different language specified. In your client, check the data in the response payload and if the data indicates retrying with another language, send another request with a different language specified in the input audio config with the same audio.