Always get the machine to translate it back again as a first check that you haven't got something that the system isn't good at. I use it often when I write Norwegian because even after thirty years I still don't remember what gender everything is (I'm English but I write in Norwegian when writing to the locals). If I don't get my original Norwegian back I know it's worth a closer look.

Doing it from your own language to a language you don't speak at all without at least that simple double check is asking for trouble.