Proposal for 3.2.x Spell Checking

3.2.x Provide spell checking functionality

User agents provide spell checking functionality for text created inside the user agent (level AA).

Intent:
Users with various disabilities benefit from the features found in spell checkers today when composing text.  It is commonplace to create significant amounts of content inside a user agent today for tasks such as email, social networking and web-based productivity applications such as word processors.  The intent of this success criteria is to ensure that users with disabilities can easily correct spelling errors when composing text.

Example:
Amanda is dyslexic and frequently spells words incorrectly.  She is able to correct words when alerted to the errors.  She navigates to her web-based email application and composes a new message.  The user agent alerts her to spelling errors as she is typing and she quickly corrects the mistakes and sends an error free message.