| first language | 400 million people speak English as their first language. |
| mother tongue | (n) one's native language; the language learned by children and passed from one generation to the next, Syn. maternal language, first language |
| 第一言語 | [だいいちげんご, daiichigengo] (n) first language [Add to Longdo] |
| Muttersprache { f } | native language; native tongue; first language [Add to Longdo] |