public Builder setLanguages(
        int index, com.google.cloud.translate.v3.DetectedLanguage.Builder builderForValue) {
      if (languagesBuilder_ == null) {
        ensureLanguagesIsMutable();
        languages_.set(index, builderForValue.build());
        onChanged();
      } else {
        languagesBuilder_.setMessage(index, builderForValue.build());
      }
      return this;
    }
<pre>
The most probable language detected by the Translation API. For each
request, the Translation API will always return only one result.
</pre>

<code>repeated .google.cloud.translation.v3.DetectedLanguage languages = 1;</code>
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/DetectLanguageResponse.java