= Englisch [EN], 
= Deutsch [DE], 
= Französisch [FR]. Wenn du die angegebene Sprache nicht beherrschst, schreibe auf Englisch! Hi Ale041,
This problem is little bit hard to solve and it's really need some time. I would recommend you to give up on it, if this map isn't really best one.
So you have to rename these folders in all .map files according to mapTools.
So you should edit every path in .map files from this Sceneryobjects\BNN\Ямы на дороге\mesh.sco to this Sceneryobjects\BNN\??? ?? ??????\mesh.sco and
Sceneryobjects\Objects dop\Беларус \auto.sco to Sceneryobjects\Objects dop\???????\auto.sco.
Also you should copy and edit following 2 objects folders to correct name in OMSI2 Sceneryobjects folder.
But keep in mind that this solution may not work. With this way you can solve problems with ß, Ł, ô and other similar letter to basic letters. Another question can be if OMSI can even read question mark (?), so as I said, you should know if it's worth it to edit these names and spend some time with editing.
I did it with Notepad ++.
Theres a function to replace all the russian names to a name of your choice.
1. check all "missing" objects with maptools
2. head to sceneryobjects and find the folders with russian names
3. open notepad ++ and press ctrl + shift + f
4. paste the russian name in the 1. field
5. rename the russian folder with an other name
6. paste your name in the 2. field
7. in the 3. field write *.map
6. in the 4. field head to the map folder
7. change settings to the settings i showed in the picture
8. press the 2. button on the right and click ok
9. Done!
Check map tools again and do this with every folder that has russian names.
Took me 15 minutes.