Sure.
My source for this is a lecture given by the great courses plus (I believe its called "6000 miles and 6000 years: A history of the steppes" but I haven't installed audible on my new phone to five an exact source).
The general issues were the mass practicing of activities usually considered forbidden in Islam or antithetical to it. Alcoholic drinks were not only drunk, but done so in ritual fashion. Skulls were used in rites, there was a general animism and depiction of art which probably came from the Manicheans (whom the turks referred to as "Mani the Painter") resulting in paintings of Muhammad and totem like depictions of Allah. Old Turkish deities were still revered, sometimes practice being closer to Tengriism but calling Tengri Allah instead. Sufis were popular amongst the Turks because they were similar to their own shamans and were often treated as special conduits to the divine.
Apparently, the practices were frowned upon across most of the history of the caliphates but was tolerated due to the desire to use the Turks against enemies of the faith.
How did the Russians codify by language?