Slovenian is quite a strange language. For years ago 3,4,5,... are the same. For years from now 3 and 4 are the same and everything from 5 on is the same. 

This difference for numbers 3 and 4 occurs only when counting. We don't have actual trial or quadral grammatical numbers (we do have dual tho). I implemented this by using a different postfix for dual and one combined one for 3 and 4. Which is why some test seems duplicate since in some cases 3 and 4 are the same a 5. Those tests check if the resource files does indeed has the (duplicate) value for number 3 and 4.

Well testing for 10 could probably be omitted, since it's always the same as for 5.