Not only that.. but didn't write a single russian post between 2014 and 2017 too.
Only english and german (and one chinese).
Well, alright. Mystery solved. It was ban evasion.
@suchmoon, go delete your post admitting you don't always find the plagiarisms.. fast, before o_e_l_e_o sees it.
Claim there was no in this case

Edit:
Can't be ban evasion.
gasparik87 got banned
8/2/2019 2:29:25 AM (according to bpip)
shimlbit got banned
8/1/2019 9:53:45 PM (according to bpip)
So.. might be roughly the same time (i don't know how bpip polls the mod log).
Therefore it can't be ban evasion.