One/many plural rule for Russian/Belarusian/etc
Isn't that what the default value is for?
I don't know is it enough or not. But in any case rules for selecting proper form ar different in situations I described at least in several Slavic languages.
You have read Translation notes from Translating:FreeCol, have you?
Yes, I read this document before asking question there. Documentation is not clear for case I asked you.
Since you collaborating with FreeCol developers and also familiar with MediaWiki code, could you please compare plural implementation for MediaWiki Russian/Belarusian with FreeCol one and make necessary changes to FreeCol code or documentation if needed.
I can, but I don't understand what changes you would like. The only difference between these two is that FreeCol does not support the two form shorthand, but uses default parameter instead.
Rule to choose one form is different. In 3-form case it's 1, 21, 31, etc. In 2-form case - it's only 1.
There is no two-case form in FreeCol nor anywhere else but in Mediawiki.
I provided examples above of FreeCol message where 2-form PLURAL should be used.
If such things are not supported by FreeCol now, so support should be added.
I'm not sure if only providing one= and other= would have the wanted behavior.