Cryllic is most widely used.

"Bukhara is one of two large cities where Tajik speakers and Uzbek speakers have been in intensive contact with each other for many centuries. Today virtually all Tajik speakers in Bukhara are bilingual in Tajik and Uzbek. This Tajik-Uzbek bilingualism appears to have had a profound influence on the phonology, morphology, and syntax of Bukharan Tajik."

"Since Bukharan Tajik is a spoken variety without a written tradition, written Bukharan Tajik is confined to very few registers, such as e-mail correspondence between native speakers and diaries, though even these are often written in Uzbek, in which, unlike in Tajik, Bukharan Tajik speakers are highly literate. Northern Tajik dialects, of which Bukharan Tajik is one, sometimes serve as a medium of written communication among Tajik speakers from Bukhara and Samarkand."