Noun
official language (plural official languages)
A language afforded an elevated status in a particular country, state, or other jurisdiction, typically for government use.
official-language
English should be our official language. Reading and speaking English are requirements to become a citizen. Ernest Istook
In fact, for a period stretching over seven hundred years, the international language of science was Arabic. For this was the language of the Qur'an, the holy book of Islam, and thus the official language of the vast Islamic Empire that, by the early eighth century CE, stretched from India to Spain. Jim Al-Khalili
I was an idealist in my profession. If I used such expression as 'Jewish bastard' or 'Jewish sow,' it simply meant that this official language had become so much a part of my flesh and blood that I saw nothing unusual in it. I never used anything but spiritual weapons in dealing with offenders. Heinrich Baab
The official language of Lebanon is Arabic. Lebanese Proverb
2007 census French is the only official language of Mayotte. Source: Internet
Abd al-Malik is credited with centralizing the administration of the Caliphate and with establishing Arabic as its official language. Source: Internet