Nice simple functional addon. RightClick, translate selected text or whole page in a new tab. Selection even works on PDFs/Moz pages so you can translate each review below :)
Change defaults (=AutoDetect, to English) in options or one-off in the translation tab.
People complaining that you have to login if you want to save HISTORY of your translations should get a life and learn to copypaste. Thanks Dev and apologies on behalf of the knockers.