So I installed 'Hackers Keyboard' and the 'English Completion Language' but when I type an email with miss-spelt words I don't get an underline and don't see option to check spelling. Am I missing something?
That may have more to do with the mail client. Try Kaiten mail. $5 US but designed for tablets and more feature rich than the default mail client - which I have used in so long I forgot what it looks like.
Locked out of your Tablet? - Printing from an Android tablet (or phone) - Connecting to the Internet with no WiFi - Move/copy/cut/paste files to and from your tablet - WiFi connection issues - Getting Flash Player