public java.lang.String getLanguageCode() {
      java.lang.Object ref = languageCode_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        languageCode_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
<pre>
Output only. The [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt)
language tag of the language in this result. This language code was
detected to have the most likelihood of being spoken in the audio.
</pre>

<code>string language_code = 5 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@return The languageCode.
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/SpeechRecognitionResult.java