Sure, but "turkey" is a bird, not a country. You at least have to write "Turkey" to be clear to English speakers. If you like, save Türkiye for your visits to the UN.

Not anymore really, at least according to their preference. At a minimum, a capital T will prevent comedic errors like a head full of feathers.

https://www.npr.org/2023/01/08/1147704945/the-state-departme...