Biloquial is an uncommon word with the meaning of speaking two languages fluently. For those who are looking for alternative words, there are a lot of synonyms for this term. The word bilingual is the most commonly used synonym for biloquial. Other synonyms include multilingual, polyglot, fluent in two languages, or biliterate. Polyglot is also a term that refers to people who are fluent in multiple languages, while multilingual refers to people who can speak more than two languages. Biliterate means the ability to read and write in two languages. All these words effectively convey the idea of someone who is capable of speaking two distinct languages.