„The language spoken at home strongly affects the likelihood that immigrant students will be academically resilient. […] Research indicates that fluency in the host-country language is one of the most important determinants of social and economic integration of immigrant students. Since humans communicate first and foremost by speaking, writing and reading, learning the language spoken in the host country has an immediate impact on immigrants’ lives and on their integration.“
OECD (Hrsg.), „The Resilience of Students with an Immigrant Background“ (2018), S. 118