public com.google.protobuf.ByteString getLanguageCodeBytes() {
      java.lang.Object ref = languageCode_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        languageCode_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Supported language code, generally consisting of its ISO 639-1
identifier, for example, 'en', 'ja'. In certain cases, ISO-639 codes
including language and region identifiers are returned (for example,
'zh-TW' and 'zh-CN').
</pre>

<code>string language_code = 1;</code>

@return The bytes for languageCode.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/SupportedLanguage.java