von Catesse (AU), 2015-05-29, 03:36   Spam?  

Thanks. I never play online games, so I do not know their abbreviations. Of course, I tried it on Google, which retrieves 1,300,000 sites for rlz, for which the most common meaning is Resort Latitude Zero. Take out "latitude", and the next most common is Rural Living Zone. Take out "rural", and up comes Relative Lempel-Ziv for Compression of Genomes.
With your hint that it was a Google abbreviation, not a Polish one, I found lots of reference to "RLZ parameters", and - eventually - came across the explanation you gave.
http://www.internetslang.com/RLZ-meaning-definition.asp
Now I am wondering what "emm" means, but I think that I shall not bother chasing it up.
My knowledge of Polish is fairly pathetic, but my German is quite good. However, I don't speak Internet.
(PS: I have just bought a new laptop, and my supplier is installing a Polish spellcheck program. Now, if it works properly, that is luxury. Would I like French and German? Probably, but not enough to pay the extra fee.)