What language should I continue learning?

I have 10 years experience of French and my native language is Polish but I'm Hungarian and was trying to learn it but also I wanted to learn German. I love Korean and Japanese also but I can read and write in Korean already. I wanted to learn Latin but idk if I should. Then I tried learning Russian but its easy since I can understand cyrillic and it's like Polish. Hmmmm I'm so confused.