public java.util.List<String> getAdditionalLanguageCodes() {
        return additionalLanguageCodes;
    }
<p>
Additional codes for languages available for the specified voice in addition to its default language.
</p>
<p>
For example, the default language for Aditi is Indian English (en-IN) because it was first used for that
language. Since Aditi is bilingual and fluent in both Indian English and Hindi, this parameter would show the
code <code>hi-IN</code>.
</p>

@return Additional codes for languages available for the specified voice in addition to its default language.
        </p>
        <p>
        For example, the default language for Aditi is Indian English (en-IN) because it was first used for that
        language. Since Aditi is bilingual and fluent in both Indian English and Hindi, this parameter would show
        the code <code>hi-IN</code>.
@see LanguageCode
aws-java-sdk-polly/src/main/java/com/amazonaws/services/polly/model/Voice.java