Documentation of plural rules

I have drafted a list of Mediawiki plural rules for all languages. I would be grateful if a translator could check that the rules for Upper Sorbian are correctly recorded in the list. If I have made a mistake please go ahead and correct it.

It could also be useful to any future new translators for Upper Sorbian to be able to read notes on using plural, especially Mediawiki plural, on your portal or a sub-page of the portal. I note that the various plural systems used by projects have different rules for Upper Sorbian.