Sentence:  The degree to which Yahudic lects differ from coterritorial non-Jewish lects varies spatially, chronologically, stylistically, and idiolectically (for this reason it is important to study each Yahudic <WSD>topolect</WSD> together with its coterritorial Arabic <WSD>topolect</WSD> if it has one). 
Meaning of the word marked with <WSD> tags:  The speech form, variety (lect) of a particular place or region.