The website I'm building needs to distinguish between Dutch speaking customers from Belgium and French speaking customers from Belgium. I need to address both groups in their native language.
How would I formulate that correctly? 'Belgique Francophone'? 'Belgique Français'? Another way in the form of 'French speaking Belgians'?
There are different ways to do but :
Français (France) Français (Belgique) Français (Canada)is clear for Belgians and French if they go on your website.
Fabien's answer focuses on a list of languages. However, you might be interested in showing the user a list of countries instead, with the language when disambiguation is needed:
...
België (Nederlands)
Belgique (Français)
...
Canada (English)
Canada (Français)
...
France
...
You could even omit the language if the name of the country is spelled differently in each language, like België/Belgique for example. You'd still have to indicate the language for countries like Canada, which is spelled the same way in English and French. This is the approach used by Apple.
Others like Microsoft prefer to always indicate the country, even if no disambiguation is needed.
Un (ou une) Belge francophone habite en général Bruxelles ou une partie de la région Wallone appelée souvent [Wallonie][1].
La Communauté française de Belgique1 désigne les territoires où le français est la langue administrative.
La communauté francophone Belge regroupe les locuteurs français.
