西班牙语是我的母语，但我五岁开始学习英语。

Spanish is my ___mother ___tongue, but I started learning English when I was five.

除了我的母语韩语，我还能流利地说日语和汉语。

Besides my ___mother ___tongue, Korean, I can speak Japanese and Chinese fluently.

一个孩子的母语通常是他们家庭在家使用的语言。

A child's ___mother ___tongue is often the language used by their family at home.