„Language barriers, in particular, affect the integration of immigrants across all education levels and beyond. Indeed, according to researchers, the fluency in the host-country language does not only affect integration in education, but also in labour markets and within societies more broadly. […] Language fluency is correlated with higher productivity, wages and improved matching of skills and qualifications. Beyond that, research highlights that social outcomes of immigrants are also impacted by the level of language proficiency of immigrants.“
Dr. Lucie Cerna u. a., The resilience of students with an immigrant background (2021), S. 35.