public Builder clearLanguageCode() {
      languageCode_ = getDefaultInstance().getLanguageCode();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
The ISO-639 language code of the source content in the request, detected
automatically.
</pre>

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

@return This builder for chaining.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/DetectedLanguage.java