With the following definition:
To lower in quality or character.
Synonyms found:
corrupt, pervert, subvert, demoralize, demoralise, debauch, debase, profane, vitiate, deprave, misdirect
However all of those have a very "intentionally evil" connotation. I would say more along the lines of "messed up", but it needs to portray that it's somewhat intentional, just not with the evil slant.
Intentionally done, but unintentionally wrong, is what I'm looking for.
Perfect Example:
My nick name on here is Aequitarum Custos, which is a "bastardized" Latin, it should have been Aequitatis Custos (the correct way to say what I wanted).
I intentionally created my nick like that, but had no intention to make it wrong.
Reason for desiring a synonym is due to the perceived obscenity of the word bastard by some people.
Best Answer
Most words which are synonymous with bastardized will probably have negative connotations, I would imagine. Several that have been suggested (adulterate, debase, contaminated, pollute) all sound negative to me. The reason is that most of these things are not desirable things. Nobody wants contamination or pollution or something that's been reduced to its base form.
Thus I'd suggest other words that don't imply so much destruction: