// Build recognition config
RecognitionConfig config = RecognitionConfig.newBuilder()
    .setModel("chirp_2")
    .setLanguageCode("cmn-Hans-CN")  // ← fails here
    .build();
StreamingRecognitionConfig streamingConfig =
    StreamingRecognitionConfig.newBuilder()
        .setConfig(config)
        .build();

// Start streaming
try (SpeechClient client = SpeechClient.create(
         SpeechSettings.newBuilder()
             .setEndpoint("us-central1-speech.googleapis.com:443")
             .build())) {
    ClientStream<StreamingRecognizeRequest> stream =
        client.streamingRecognizeCallable()
              .splitCall(responseObserver);
    // First request with config
    stream.send(StreamingRecognizeRequest.newBuilder()
          .setStreamingConfig(streamingConfig)
          .build());
    // Then send audio data...
} catch (Exception e) {
    Log.e("SpeechTest", "Streaming failed", e);
}


Error log:
`com.google.api.gax.rpc.CancelledException: io.grpc.StatusRuntimeException: CANCELLED: The operation was cancelled.
    at com.google.api.gax.rpc.ApiExceptions.callAndTranslateApiException(ApiExceptions.java:…)
    at com.google.cloud.speech.v2.StreamingRecognizeClient.streamingRecognizeCallable(StreamingRecognizeClient.java:…)
    …
05-14 16:42:40.052 26220 26279 E MyApp: com.google.api.gax.rpc.CancelledException: io.grpc.StatusRuntimeException: CANCELLED: The operation was cancelled.
`

What I’ve tried so far:
Confirmed that the same code/config works for ja-JP and en-US.
Tried both cmn-Hans-CN and zh-CN—both cancel immediately.
Verified network connectivity and valid credentials.

Question:
Is there an additional setting or limitation when using Simplified Chinese (cmn-Hans-CN) with the chirp_2 model?
How can I get streaming recognition working for Simplified Chinese?
Any pointers or troubleshooting steps would be greatly appreciated!