You are expected to complete assignments individually. If a student copies another's work, both students will receive a zero.
The use of online translators is also forbidden. If you use an online translator to complete an assignment, you will also receive a zero. If you don't do your own work, it's cheating, regardless of whether a human or a machine does it. And it's usually pretty obvious to me whether you've done your own work or not!
"One does not simply trust Google Translator."
--Boromir, Lord of the Rings
(OK, he didn't actually say this, but the point has been made!)