Learn how to say Bilingualism correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word bilingual:
speaking two languages fluently:
a bilingual secretary
(of a text or an activity) written or conducted in two languages:
(of a country, city, or other community) using two languages, especially officially.
a person fluent in two languages.
mid 19th century: from Latin bilinguis, from bi- ‘having two’ + lingua ‘tongue’ + -al