I'd like to invite you to Belgium, a trilingual country. And no, here a lot of people don't speak all three (nor even the major two). French and Flemish are not

I'd like to invite you to Belgium, a trilingual country. And no, here a lot of people don't speak all three (nor even the major two). French and Flemish are not close to each other at all. Your comment sounds fine on the surface, if you don't actually stop to think about it. It's horribly wrong in lots of Europe, Africa, south America and Asia, hell even in the US it's not correct everywhere.