Sentence:  From its earlier position as the vernacular of an entire religio-ethnic community it is now the vernacular only of atypical sub-groups who have not participated in the <WSD>de-ethnization</WSD> and acculturation of the general Jewish community. 
Meaning of the word marked with <WSD> tags:  The act or process of ceasing to be, or of causing (a group) to cease to be, an ethnicity or a distinct people.