public com.google.cloud.translate.v3beta1.DetectedLanguage.Builder addLanguagesBuilder() {
      return getLanguagesFieldBuilder()
          .addBuilder(com.google.cloud.translate.v3beta1.DetectedLanguage.getDefaultInstance());
    }
<pre>
A list of detected languages sorted by detection confidence in descending
order. The most probable language first.
</pre>

<code>repeated .google.cloud.translation.v3beta1.DetectedLanguage languages = 1;</code>
java-translate/proto-google-cloud-translate-v3beta1/src/main/java/com/google/cloud/translate/v3beta1/DetectLanguageResponse.java