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>
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 languageCode.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/SupportedLanguage.java