diatopic

From dia- +‎ -topic.

diatopic (not comparable)

1. (chiefly phonetics) Occurring over or changing with space; geographic.
2. (chiefly phonetics) Of, pertaining to or concerned with changes that occur over space.
   • 1989, William Veder, Texts of Closed Tradition – The Key to the Manuscript Heritage of Old Rus’:

     The variant forms of textual tradition, relevant on the level of the diachronic and diatopic study of the text, were irrelevant on the level of the single manuscript.

• diatopically

• diatopy