static new ThreadLocal<Set<S>> ai_languages_value;

static Set<S> ai_languages() {
  Set<S> set = ai_languages_value!;
  if (nempty(set)) ret set;
  ret litciset(ai_language());
}

svoid _onLoad_ai_languages {
  _threadInfo_addMakerAndRetriever(
    voidfunc(Map map) { mapPut(map, 'ai_languages_value, ai_languages_value!) },
    voidfunc(Map map) { ai_setLanguages((Set<S>) map.get('ai_languages_value)) });
}

Began life as a copy of #1017358