heritage language
US /ˈher.ɪ.tɪdʒ ˌlæŋ.ɡwɪdʒ/
UK /ˈher.ɪ.tɪdʒ ˌlæŋ.ɡwɪdʒ/

1.
모국어, 조상어
a language, other than the dominant language of a country, that is learned by individuals at home, usually from their parents or grandparents, and is associated with their cultural or ethnic identity
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Many second-generation immigrants learn their parents' heritage language to stay connected to their roots.
많은 2세대 이민자들은 그들의 뿌리와 연결되기 위해 부모님의 모국어를 배웁니다.
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Schools are increasingly offering programs to support the maintenance of heritage languages.
학교들은 모국어 유지를 지원하는 프로그램을 점점 더 많이 제공하고 있습니다.