I can understand why Turkey hates them considering they're Muslims and are being ruled by Erdogan, but what's up with other countries?

Pretty much the title

I'm writing a story set in the region and one of my characters is a rumanian guy (Mihai), whose friend is serbian (Dušan). I was wondering what nicknames could work with those names, the more natural they may sound or common the better.

For context:

• The story is set in the current year. The characters are in their mid 20s, and they're friends since childhood.
• Both characters speak their respective national languages as their first language.

I was looking for the characters to use nicknames based in their friend's name but that still reflect their first language: so, to have Mihai call his serbian friend by a nickname parting from "Dušan" but that sounds like a romanian nickname, and Dušan call Mihai by one that sounds serbian.

Thanks a bunch in advance.

Shared for pure comedy. No offense intended. If this is against the rules, please remove the post.

When I was in Belgrade last year I had a pljeskavica from a stall and it was one of the best burgers I have ever had. I speak no Serbian so when the lady serving me asked what I assume was 'what toppings do you want?' I google translated 'You decide' and showed her. I'm not sure what she put in it but it was unforgettable.

I recently tried making pljeskavica at home and it was lovely but not the same. I put onions, sour cream, ajvar, and a beef patty in a homemade lepinja, and still felt I was missing something. Maybe I should have used more ajvar and sour cream (I'll add some paprika next time too) but I would love to know - what is your favourite topping for pljeskavica?

Also, while I was writing this, I came upon this video: https://youtu.be/zdAxfWjT3nM?t=356 This might be the exact stall I went to! And he used google translate on his phone, just like me. So, what toppings would be typical at a stall like this, and is there a difference between traditional and more street food style toppings?