Formatting plural on Shapado and Open Street Map

You should always use all n forms if your language has n forms. No more, no less. The potential duplication involved in some cases is "system cost". I know this works differently in MediaWiki, but not all products have as advanced an internationalisation framework as MediaWiki has.

In the message [1] the variable cannot be a fraction. So the Belarusian translation does not contain the form 'other', which is for fractions. Is this OK?