The term "bilingualist" refers to someone who can speak two languages fluently. Some synonyms for the word "bilingualist" could include polyglot, bilingual, multilingual, linguist, or language enthusiast. A polyglot is someone who speaks multiple languages, while a linguist is someone who studies languages, including their structures, grammar, and usage. The term bilingual refers to someone who speaks two languages, while multilingual means someone who speaks more than two languages. A language enthusiast is someone who has a passion for languages and may be interested in learning multiple languages. Overall, there are many ways to describe someone who is skilled in speaking multiple languages.