public boolean careAboutLanguage(String language) {
    if (excludeLanguages.contains(language))
      return false;
    if (includeLanguages.contains(language))
      return true;
    return defaultInclude;
  }
Returns true if {@code language} is in the set of language translations to use.
planetiler-core/src/main/java/com/onthegomap/planetiler/util/Translations.java