我的母语是日语。

My mother tongue is Japanese.

Source: Tatoeba

Sentence Composition

1 我 wǒ
  1. I
  2. me
  3. my
=2 的 de
  1. of; ~'s (possessive particle)
  2. (used after an attribute when it modifies a noun)
  3. (used at the end of a declarative sentence for emphasis)
  4. (used after a noun, verb or adjective to form a nominal expression, as in 皮革的 pígéde "one made of leather" or 跑堂儿的 pǎotángrde "a waiter (literally, one who runs back and forth in a restaurant)" or 新的 xīnde "new one")
  5. also pr. dì or di in poetry and songs
=2 的 dī a taxi; a cab (abbr. for 的士 dīshì)
=2 的 dí really and truly
=2 的 dì (bound form) bull's-eye; target
3 母语 mǔyǔ
  1. native language
  2. mother tongue
  3. (linguistics) parent language
4 是日 shìrì
  1. (formal) this day
  2. that day
=5 语 yǔ
  1. dialect
  2. language
  3. speech
=5 语 yù (literary) to tell; to let (sb) know