In response to Paul Kroeger's posting:
In 1973 Paul Schachter wrote an article entitled "Focus and
Relativization for Language", v. 49, issue 1. The languages analysed
were English, Akan (a Niger-Congo language of Ghana), Hausa,
(Afro-Asiatic language of Nigeria), and Ilonhggo (a
Malayo-Polynesianlanguage of the Philippines).