Solecism :: Solecism (n.) An impropriety or incongruity of language in the combination of words or parts of a sentence; esp., deviation from the idiom of a language or from the rules of syntax..
Solecism :: Solecism (n.) Any inconsistency, unfitness, absurdity, or impropriety, as in deeds or manners..
Solecist :: Solecist (n.) One who commits a solecism.