Remove words from autocomplete permanently.

Please add the option to remove words from the dictionary permanently. For example, remove "y" permanently. I either have stupid big thumbs or crappy hand eye coordination, but I often hit y instead of the suggested word. I've also removed "God" from the dictionary multiple times, but it keeps coming back. There's no reason for god to be capitalized when you say "god damnit" or "oh god". Are SwiftKey developers particularly religious folks? If not, why does this (and other deleted words) keep being added back to the dictionary?