public String getLanguageCode() {
        return this.languageCode;
    }
Specify the language, using the ISO 639-2 three-letter code listed at
https://www.loc.gov/standards/iso639-2/php/code_list.php.

@return Specify the language, using the ISO 639-2 three-letter code listed at
        https://www.loc.gov/standards/iso639-2/php/code_list.php.
@see LanguageCode
aws-java-sdk-mediaconvert/src/main/java/com/amazonaws/services/mediaconvert/model/HlsCaptionLanguageMapping.java