Definition
The language a person learns from birth; the first language one is exposed to.
母語
Her native language is Spanish, but she also speaks fluent English.
她的母語是西班牙語，但她也能說流利的英語。
At international conferences, delegates often speak in their native language.
在國際會議上，代表們通常用他們的母語發言。
Despite living abroad for many years, he still speaks his native language fluently.
儘管在國外生活多年，他仍然能流利地說他的母語。