public com.google.cloud.vision.v1p3beta1.TextAnnotation.DetectedLanguage.Builder
          addDetectedLanguagesBuilder(int index) {
        return getDetectedLanguagesFieldBuilder()
            .addBuilder(
                index,
                com.google.cloud.vision.v1p3beta1.TextAnnotation.DetectedLanguage
                    .getDefaultInstance());
      }
<pre>
A list of detected languages together with confidence.
</pre>

<code>
repeated .google.cloud.vision.v1p3beta1.TextAnnotation.DetectedLanguage detected_languages = 1;
</code>
java-vision/proto-google-cloud-vision-v1p3beta1/src/main/java/com/google/cloud/vision/v1p3beta1/TextAnnotation.java