public static boolean hasMacroLanguage(String languageTag) {
        // Locale locale = Locale.forLanguageTag(languageTag); // unused
        // TODO make it so
        return false;
    }
Support for language tags (as defined by https://tools.ietf.org/html/bcp47)
<p>
See https://en.wikipedia.org/wiki/List_of_ISO_639-3_codes for a list of
three character language codes.
<p>
TODO change to LanguageTag, and use these vs. strings everywhere in the
language detector API?
tika-core/src/main/java/org/apache/tika/language/detect/LanguageNames.java