In only a few education systems do 10 % or more students attend schools where less than a quarter of students speak the language of instruction at home …

„In only a few education systems do 10 % or more students attend schools where less than a quarter of students speak the language of instruction at home (Belgium-Flemish Community, Bulgaria, Germany, Latvia, Austria and the United Kingdom-England).“
EU-Kommission (Hrsg.), Integrating Students from Migrant Backgrounds into Schools in Europe (2019), S. 47.