A heritage language is a minority language (either immigrant or indigenous) learned by its speakers at home as children, but never fully developed because of insufficient input from the social environment. The speakers grow up with a different dominant language in which they become more competent. Polinsky and Kagan label it as a continuum (taken from Valdés definition of heritage language) that ranges from fluent speakers to barely-speaking individuals of the home language. In some countries or cultures in which they determine one's mother tongue by the ethnic group, a heritage language would be linked to the native language.