Young people here know English, German, French, Spanish, Italian and Russian to name a few. So if you just speak English, there would not be any problem, and even if you cant find someone that knows English from the older folks, they will always try and help you. Being amazing hosts is something my people are known for.
I work in a student organisation and I am part of a team that works with foreign students that arrive here for internships. Most of them had really good time here. Plus the cost of living here is not that much, so that always helps.
Other countries in the region I would also suggest are Hungary, Montenegro, Croatia, Bosnia & Hercegovina, Macedonia, Greece, Slovenia, Slovakia, and Czechia.
Aka, people should visit more Slavic countries, they look amazing.