じこくご
one's native language; one's mother tongue
Noun
インターネットを使つかって異国いこく語ごを学まなぶものがいる一方いっぽう、一日いちにち1$以下いかで暮くらし自国語じこくごさえ読よめないものがいる。
While there are some people who use the Internet to learn foreign languages, there are others, living on less than a dollar a day, who cannot even read their own language.