官方语言 the official language ; Official communication language

官方、正式语言 official language

英语和法语是加拿大的官方语言 official language

第一官方语言 First official language

第二官方语言 second official language ; nd Official Language

英格兰的官方语言 the official language of England

一种官方语言 An official language

非官方语言 non-official language

官方语言法 Official Language Act

汉语是我们的官方语言 Chinese is our official language