Method of filtering Language


I have an account on twitter. I am Turkish. When I wrote a post in Turkish and search it by lang:tr , I could not find it on twitter search. My location sharing is selected on my settings. I tried writing post both English and Turkish language interface setting, but I could not be successful to discover it.

I am suspicious about api is looking if post contains Turkish character. Because I wrote a post which contains Turkish character and I could find it while searching by lang:tr Is it true? Thanks.