I had a poke through Kate's settings... try going to Editing > Auto Completion and turning off keyword completion?
It says
Keyword completion provides suggestions based on the keywords which exist in the document's language.
which sounds promising. I guess they just added e.g. "English" along with all the programming languages, heh (in a programming language it would autocomplete stuff like "if" and "for").
... I tried turning it off though and it didn't seem to help, which is weird, because it looks like it should.
-- Ylfingr
