We don't have synonyms for polygl yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are polyol.
°One who masters, notably speaks, several languages.
°A publication containing several versions of the same text, or the same subject matter in several languages; especially, the Bible in several languages.
°One who masters, notably speaks, several languages.
°A publication containing several versions of the same text, or the same subject matter in several languages; especially, the Bible in several languages.