Adjective
co-official (not comparable)
Jointly official, having full official status alongside another official one.
Catalan is a co-official language of the European Union.
In these regions official documents are bilingual (trilingual in Ladin communities), or available upon request in either Italian or the co-official language. Source: Internet
Third article. citation Spanish remains the only official language of the state; other languages are only co-official with Spanish in the communities that have so regulated. Source: Internet
Only Spanish is an official language of Navarre, and the Basque language is only co-official in the province's northern region, where most Basque-speaking Navarrese are concentrated. Source: Internet
Cyrillic is co-official with another alphabet. Source: Internet
English is co-official and also used in education, while Arabic is used for religious purposes and education. Source: Internet
Geographical distribution seeAlso Official or co-official language Spanish is the primary language of 20 countries worldwide. Source: Internet