Glad you asked. It is very acceptable. I lived there over a decade. Plenty of Kurdish spoken daily. It would be hard to even go a single day in public without hearing some Kurdish. What is not allowed is Kurdish as a primary language in the public education system. You can learn any language as a secondary language, but they want Turkish to be your mother tongue. Private schools can teach any language as well. A secondary language is very common in Turkey. Usually it is English.

18% of Turkish citizens are Kurdish. 18% of the Turkish military is Kurdish. There is a Kurdish political party in Turkey called The Peoples' Democratic Party. It controls 56 seat out of 600 in the Grand National Assembly with hundreds of provincial and municipal councillors.

Turkey’s beef is with the PKK and the YPG.

Basically you don’t know what the F you are talking about.