If you’re working with multiple languages in Chrome, it can be very helpful to have your spelling checked in those languages. Weblog Ghacks has a guide to installing other dictionarires.
When you install Chrome, a default language dictionary is installed along with it. Chrome will only offer spell checking for that default language—unless you install other dictionaries separately. You can add additional languages to Chrome and set those languages to spell check whenever you like.
After you install the language packs and a few setting are tweaked you can right-click in any typing field within Chrome and select a different language to check your spelling with. Hit the link below for the step by step instructions.