Spell check is one of its best features Chrome, at least because it makes the difference in the browser you choose.
It is based on Google Search spelling technology and uses advanced analysis, such as the use of grammar, homonyms, main names, and so on.
Soon, this feature will be even better. In the latest Chromium and Chrome Canary versions, you can now send feedback about spelling on Google.
This feature will be available at Chrome 29, but is currently "hidden," so it may take longer to be available for wider use.
Google only checks the feature with some users, so even if you turn it on, it will not do anything.
When this feature is enabled, any custom word you want to add to the dictionary could be sent to Google, which will use it to improve spelling suggestions for everyone.