I remind you that mapping OSM, you stick to OSM specifications and as such you can find em there:
https://wiki.openstreetmap.org/wiki/Tag:railway%3Dlight_rail#Definition
There is no clear definition of light rail on OSM... ...In order to avoid conflict, please seek consensus on the forum or mailing lists before retagging.

Which you obviously did not. 
You also did not participate in forum discussion regarding rapid trams all across Poland, so yeah. First do it, then retag and maybe do it from your main account and not a dummy one. Be honest with people rather than jump in and map whatever. 
