Synonyms of localism

1 Syllable
speech, talk
2 Syllables
dialect, idiom, lingo, idioms, phrase, tongue, patois, argot, diction, jargon
3 Syllables
barbarisms, parlance, language, expression, locution, barbarism
4 Syllables
vernacular, colloquialism, regionalism, provincialism
5 Syllables
idiosyncrasy
6 Syllables
vernacularity