This is going to sound funny, but is it typing in Spanish? You'll see this when you have multiple languages installed, even if it's English US and UK. The solution is usually to just remove all other languages from the BB. Setup > Setup Wizard > Localization. While that will usually fix the problem, I have seen where it won't and the two options are to wipe the device or do a selective restore from a recent backup. You can also remove other languages through DM from Add/Remove Applications. This is unless you need two languages on there, which case there's nothing you can do. The other feature you mentioned, AutoText, can be enabled/disabled through Options > Autotext.