Google Chrome 26, which recently landed on the stable channel, includes an intelligent cloud based spell checker that can offer users more than simple spell check. The most notable improvement is the ability to perform context sensitive corrections, check grammar and distinguish between homonyms. Additionally, words added to the browser's custom dictionary can now be synced between Chrome installations with Google Sync enabled.
Normally, Chrome uses a built-in dictionary to check misspelled text, but with the cloud integration, Chrome users can access the same spell checking technology that powers Google Search. The obvious caveat is that misspelled words will have to be sent to Google’s server for correction. The data sent is anonymous, and Google will probably use the data for some purpose, like it does when you use Google Search or the company's other products. If you have problems with that, don’t worry, the new spell checker is optional.
Google has also refreshed the dictionaries for Chrome’s default spell-checker, which now includes support for three additional languages: Korean, Tamil, and Albanian. Those who use Google’s sync feature can now get their custom dictionary shared across all their devices.
To enable new spell checker, right-click inside the text field that you're typing in and select Spell-checker options >Ask Google for suggestions. Alternatively, open Chrome’s settings page, click on Advanced settings and then under Privacy, check the box “Use a web service to help resolve spelling errors”
via Softpedia News