“…Regarding children, about one-third of kindergarten children under six years of age in Berlin have a non-German family language, i.e., their heritage language (HL) (Autorengruppe Bildungsberichterstattung 2020). Although Russian-and Turkish-speaking communities in Germany differ in many respects regarding their social, cultural, and demographic backgrounds, as well as their immigrant history, attitudes toward language retention (e.g., presence of HLs on an institutional level) and different language maintenance opportunities (e.g., access to HL media), both languages are vital and well retained in their respective communities (see, e.g., Olfert and Schmitz 2018). This especially applies to large cities with a high percentage of Russian-and Turkishspeaking populations such as Berlin.…”