Change default spelling/grammar on android?

Not sure if this is the right sub forum, mods please move if its wrong

Hi, I've been googling for a few days now and I can't find an answer to this problem.

Specifically, I want the default for "god" to change to "God".

Adding to user dictionary does not solve the problem because its not a new/misspelled word, its a grammar change on an existing word.

Ideas?

(Im running CM 10.0)