"I am from Belgium."
Translation:Ik kom uit België.
It's just not the way we speak. We say, "I come from Belgium" rather than, "I am from Belgium". On the other hand, you can say, "Ik ben hier niet bekend" which means, "I'm not from here" although literally it means, "I am not known here", so there are some weird exceptions. If you did say "Ik ben van Belgie" your listeners would be waiting for you to finish the sentence with something like 'gekomen' which would imply that you had just traveled there and had recently returned, rather than being a Belgian citizen.