I tried resetting to default settings of keyboard and didn't fix anything. had to turn off the auto predict so that it wouldn't replace every word I type with the same word but all caps.
If you've already tried resetting to default, try going into your app settings and force stop the keyboard app. Then restart your phone. If that doesn't work you might need to do a full factory reset. But before doing so, make sure you back up all of your content into the cloud or an SD card. Then unmount your sd card through settings and remove it. Then do the factory reset. I hope this helps.
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