Flow Keyboard only types people's names

I'm using theLumia 930 with WP8.1. When I use the Flow Keyboard, it only types proper nouns and people's names. For example, when I try to type "disorganised" it types "Fernandez". When I try to type "anything" it types "Anthony". There are no suggestions for the word I want to type; only other proper nouns that may fit. Really annoying because it wasn't always like this. It was fine until about 2 days ago. I haven't updated it, changed any settings, hard-reset it or added any new languages. Anyone have any idea what's going on?