What do you call a country that has two official languages?

There isn't a single, universally accepted term for a country with two official languages. However, here are some terms you could use:

Formal:

* Bilingual country: This is the most straightforward and commonly used term.

* Officially bilingual country: This emphasizes the official status of both languages.

* Country with two official languages: This is a clear and descriptive option.

Informal:

* Dual-language country: This emphasizes the equal status of both languages.

* Bi-lingual nation: This is a slightly more poetic term.

Ultimately, the best term to use will depend on the specific context and your desired level of formality.