Really? Um, it’s standard MLA style. Used by Wikipedia, every school I’ve attended, and quite a number of serious publications, in America anyway. MLA is essentially one of THE handbooks for academic and other non-technical writing. Here is a copy of the relevant guidelines, from Purdue University’s website.I've never seen this in print - my experience is that quote marks are used for - well - quotes, and of course the so-called "scary quotes".
The Bulbapedia MoS says “Bulbapedia is designed to be an encyclopedia, and as such should contain the best possible level of literary style.”
Well, in English, MLA is definitely among “the best possible level of literary style”. It would take a little research to check, but I am pretty sure other major style guides, like Chicago, the AP, Fowler’s, and Oxford would agree.
Oh, and, on translations, I can’t find any guidelines, but, I agree they should be italicized. Just, with quotes too when they are episode or song titles.