@java.lang.Override
    public final Builder mergeUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.mergeUnknownFields(unknownFields);
    }
<pre>
The ISO-639 language code of source text in the initial request, detected
automatically, if no source language was passed within the initial
request. If the source language was passed, auto-detection of the language
does not occur and this field is empty.
</pre>

<code>string detected_language_code = 2;</code>

@param value The bytes for detectedLanguageCode to set.
@return This builder for chaining.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/Romanization.java