I always curious how wrong grammar can change its meaning...

Late to the game but it's a mistranslation, not a grammar issue: "This toilet flushes automatically after you leave; no need to flush."

English is used quite liberally outside English-speaking countries I'm looking forward to OSSS translations

We all know it's a mistranslation, which is what all of those Engrish sites and stuff are about. We're laughing about what the English means, as the way the grammar is structured there, it completely changes the meaning of what it should be.

Also, the English is supposed to be what it says up top, which is "This toilet has a fully automatic system."