Nobody says huitante in Belgium.
It's 60, 70, 4*20, 90.
edit: Downvote all you want. If you say huitante in Belgium, everyone will know you're not from Belgium.
Belgians say Soixante, Septante, Quatre-vingt, Nonante. Even in the dutch language part, that's how they learn french.
If you say Soixante-dix or Quatre-vingt-dix, everyone will know you're french and not Belgian. Pretty simple...
You sound like a pleasant chap to be around...