You can indeed use it for other languages but the results it gives are not good for other languages except English. It shows less results for other languages.
I'm almost 99% sure that the reason for bad results except English keywords is that you can only set a country and not a language, so it uses always the English language.
I think he also can better remove (or improve) the Competition Score field because it shows strange results, that need a lot improvement because highly competitive keywords get sometimes a low number and less competitive numbers get sometimes high numbers.
It misses also a filter for GMS and LMS. You can use it yet only when doing the initial search.
It probably also misses the checkbox "Only show ideas closely related to my search terms"
It misses also an undo function, like when we for example remove a keyword (by mistake) then we can't get it back.