_SetPreferredLanguages
status_t _SetPreferredLanguages(const BMessage* msg);
status = _SetPreferredLanguages(languages);
_SetPreferredLanguages(&settings);
_SetPreferredLanguages(preferredLanguages);
_SetPreferredLanguages(fInitialPreferredLanguages);
_SetPreferredLanguages(preferredLanguages);
void _SetPreferredLanguages(