No OP but it's really not just "formal writing". I personally haven't even tested it on formal writing yet (mostly passages of fiction) and it's target language

No OP but it's really not just "formal writing". I personally haven't even tested it on formal writing yet (mostly passages of fiction) and it's target language to English is miles ahead of any other machine translator out there. and Frankly, better than most human translations i've come across.