Error analysis (linguistics)

In linguistics, an error is the use of a word, speech act or grammatical items in such a way that it seems imperfect and significant of an incomplete learning. It is as a systematic deviation which happens when a learner has not learnt something, and consistently gets it wrong, but the attempts made to put that error into context have always gone hand in hand with either the language learning or second-language acquisition process.

Source: Wikipedia — Error analysis (linguistics) (CC BY-SA 4.0)