We don't have synonyms for diglossias yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are diglossia and diglossic.
(n) :
(linguistics, sociology) The coexistence in a given population of two closely related native languages or dialects, one of which is regarded as more prestigious than the other; the similar coexistence of two unrelated languages.
(n) :
(pathology) The presence of a cleft or doubled tongue.
(n) :
(linguistics, sociology) The coexistence in a given population of two closely related native languages or dialects, one of which is regarded as more prestigious than the other; the similar coexistence of two unrelated languages.
(n) :
(pathology) The presence of a cleft or doubled tongue.