1.
mother tongue, native language
The language of one's home country; the first language one acquires from birth. Literally means "motherland language."
彼女の母国語はフランス語だ。
Her mother tongue is French.
母国語でなら自分の気持ちをうまく伝えられる。
I can express my feelings well if it's in my native language.
母国語が違う人たちが英語を共通言語にして話し合っていた。
People with different native languages were communicating using English as a common language.
USAGE:
Used when referring to someone's first language, especially in international or multilingual contexts. More formal and precise than 母語.
COMMON COLLOCATIONS:
- 母国語で話す: to speak in one's native language
- 母国語の教育: native language education
- 母国語と外国語: native and foreign languages
SIMILAR WORDS:
- 母語: mother tongue (linguistics term; technically the language acquired first, which may differ from the national language)
- 国語: national language (refers specifically to a country's official language, or the school subject in Japan)