The impression of Belgian immigrants is that

Belgium has three official languages: Dutch, French and German. Basically, most enterprises are concentrated in Dutch-speaking and French-speaking areas. And these two languages, especially Dutch, belong to the tiny language for foreign immigrants, and few people will study them specially, and the penetration rate of French is slightly better. The economically developed area of Belgium is in Flanders, where Dutch is spoken. The premise of screening immigrants by employment agencies here is not to see how high your diploma is and how excellent your skills are, but to see whether you can understand Dutch and communicate. Therefore, at this point, many foreign immigrants are tied down: even if your major is strong, it is difficult to find a suitable job if you don't speak Dutch, so some of them hold highly educated diplomas.

Immigrants have to sit in assembly lines and factories and do jobs that don't match the language.