What is the author's style in Call It Sleep by Henry Roth?

Perhaps the most forceful element of Call It Sleep is the language. Author Roth has managed to achieve an exquisite blend of old and new world languages, a blend which serves to authenticate the work for the reader. Genya and Albert speak Yiddish and German, most of which David is able to understand. Genya and Bertha also speak Polish, and do so frequently when they do not wish David to understand.