Arab here. The number of Arab users on lemmy is probably in the double digits.

We badly need a proper community of our own.

You can have a look at the !yurop@lemm.ee sidebar for European countries communities

Some of them have instances, like feddit.org for German-speaking, jlai.lu for French-speaking

I, as a Turk, have nowhere where I could post Turkish content

You may be interested in this: https://lemmy.world/post/22570477

Hey there, I grew up in Latin America though I live in the US now. There's a Mexican lemmy instance posting in spanish, https://mujico.org/ but for some reason it seems to have federation problems.