We just pushed out (last week) an update that should support locale-specific number formatting, and the Belgian (BE) and Dutch (NL) formats are both included there. Are you still having this problem? If so, are you by any chance using a browser that is configured as English rather than Dutch?
If not, please let us know, and we'll investigate further.
The translation is a nontrivial effort, and we're still working on creating a vocabulary. We'll let you know as soon as that's done. Thanks for your interest!
Regards.
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