Hello there!
Thank you, I'm glad you like the style and are thinking about purchasing it. Ç ç · Ö ö · Ü ü are already added, yes. I can add the Turkish characters you need in an update soon, no problem. This font started really really simple so there's a lot of glyphs that were initially missing, haha.
As for cyrillic, it's not completely out of my plans, but it will require more time and thought. If done, I'll probably add it next year. I'll announce next year's roadmap around January.
Thanks for your feedback~