public Builder clearLanguageCode() {
      languageCode_ = getDefaultInstance().getLanguageCode();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
Supported language code, generally consisting of its ISO 639-1
identifier, for example, 'en', 'ja'. In certain cases, BCP-47 codes
including language and region identifiers are returned (for example,
'zh-TW' and 'zh-CN')
</pre>

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

@return This builder for chaining.
java-translate/proto-google-cloud-translate-v3beta1/src/main/java/com/google/cloud/translate/v3beta1/SupportedLanguage.java