Learn English – Word for a person who knows two or three languages

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A polyglot is a person who is fluent in many languages, but what do we call a person who is fluent in only two or three languages?

Is bi-glot a proper term for this?

I don't think the words bilingual / trilingual fit the bill, because I am looking for a -glot word.

Bi-glot is wrong, because you’re used the Latin prefix on the Greek suffix.

It should be diglot (also occasionally spelled di-glott in the 19^th century), which the OED reports is a noun and an adjective meaning:

Using or containing two languages, bilingual; expressed or written in two languages; also as sb. A diglot book or version (cf. polyglot).

There is also a corresponding triglot for three.

Most diglots and triglots are Bibles, not people.