https://www.merriam-webster.com/thesaurus/regionalisms
REGIONALISMS Synonyms: 33 Similar Words | Merriam-Webster Thesaurus
Synonyms for REGIONALISMS: localisms, colloquialisms, idioms, dialects, pidgins, vernaculars, provincialisms, colloquials, vernacularisms, patois
merriam webstersynonymssimilarwordsthesaurus