Solecism traditionally names a grammatical or syntactic error, such as an unconventional agreement, word order, or construction. In literary writing, however, what appears incorrect may be a calculated artistic choice rather than a mistake. Poets may use solecism to represent dialect or idiolect, preserve colloquial speech, disturb formal expectations, or make a speaker sound emotionally unsettled. It can also challenge the authority of standard language by showing that expressive power does not depend on grammatical conformity. Its roughness may lend a poem intimacy, realism, urgency, or defiance.

A deliberate solecism can make a speaker sound colloquial, alienated, emotionally disrupted, or resistant to formal authority. Poets may fracture syntax to control rhythm or foreground language itself. The effect is strongest when readers can sense that the deviation is purposeful rather than accidental. Distinguish solecism from dialect: dialect follows coherent linguistic patterns and should not be treated as simply incorrect grammar.