Is there a spell check function in the web editor tool?

Not at this time, but there are free tools that will run scan spelling errors across a website. For example: 

• http://typosaur.us/
• http://www.internetmarketingninjas.com/online-spell-checker.php

Alternatively, browsers like Google Chrome, or Mozilla Firefox automatically offer spell check directly within the browser. Misspelled words will be marked with a red underline.