Mateusz Konieczny
I was unaware that placing more than one name into name field is considered OK (now I am even more confident that opening note is better than making armchair edit in case of any doubts).

I will stop referring to this as "wrong" and look through note I opened, close them and reopen with fixed description if applicable.

I opened note for this specific object because I am curious what is the peak with the longest name in Europe and though that OSM would be useful.

Currently my main problem is that some names use solely name tag with multiple names in it, without specifying names in name:lang tags (name:lang tags allow to discard name tags formed by merge of names from various languages).