SwiftKey has for a long time been auto-capitalising a some words that shouldn't be at all, and that I've never taught it to do. I have English (UK) and Norwegian installed as my dictionaries. I use to "tell" SwiftKey to delete the capitalised version all the time, but can't be bothered with that anymore. I got some advice on the old forums to ignore that and select the lower capital version every time, yet it still goes to a capitalised letter as the default.
There are a couple of words it always wants to capitalise, e and no. Why do you think it wants to capitalise these?