The lower Turkish letters look wrong for the movies in BDMV folder formats

Hi,
Lower characters as "ç, ğ, ş, i " for Turkish language do not look right for embedded ( internal) type subtitles for folder type movies (4K or 1080P bluray bdmv + certificate)
I tried everything, nothing changed…
Also, at the subtitle adjustment tab in the swipe down menu, there is no special local area setting section to select the Turkish iso or Turkish Windows)
I can see that section for only using an external subtitles.And all the lower letters as above (ç, ş, i etc) look normal (in auto mode) without making any extra adjustment.
Please comment.

Is this happening with all videos, or just a few?

Hi James,
Yes, you are right. Just a few…
Thanks