I know you are a nationalist loser but if everyone can speak whatever they want explain these:
Turkish politician speaks Kurdish, defying law:
https://www.nbcnews.com/id/wbna29366001
Turkey bans Kurdish-language play in Istanbul:
https://www.dw.com/en/turkey-bans-kurdish-language-play-in-istanbul/a-55306289
Kurdish Institute of Istanbul closed down twice:
https://en.wikipedia.org/wiki/Kurdish_Institute_of_Istanbul
Turkey bans writing of university dissertations in Kurdish