a common national language

• 民族共同语

a common national language的用法和样例：

例句

1. Every nation has its common national language.
   每个民族都有各自的民族共同语。
2. Mandarin is the common language of the Han people, while Lincang dialect is a branch of Yunnan sub-dialect in the southwest area of modern Chinese north dialect.
   摘要普通话是现代汉民族的共同语，临沧方言是现代汉语北方方言西南官话区云南次方言的一个分支。