Traditionally, barbarism refers to a word or expression considered linguistically alien, malformed, or outside accepted usage. The label has historically carried cultural prejudice, so modern readers should distinguish descriptive linguistic difference from claims of inferiority. In poetry, deliberate barbarism can preserve dialect, evoke multilingual encounter, challenge elite standards of correctness, or create strangeness and verbal energy. A poet may use it to make a speaker’s voice socially specific or to show language changing at the boundaries between communities, eras, and traditions.

Barbarism may introduce foreign words, obsolete forms, dialect, coined language, or deliberately nonstandard usage. In poetry, it can establish historical setting, cultural texture, estrangement, or a distinctive speaker. Consider audience and context carefully, especially when representing languages or dialects not your own, so the effect is not merely decorative or caricaturing.