On average across OECD countries in 2018, 48 % of 15-year-old first- and second-generation immigrant students did not speak the language of the PISA assessment at home …

„On average across OECD countries in 2018, 48 % of 15-year-old first- and second-generation immigrant students did not speak the language of the PISA assessment at home.“
OECD (Hrsg.), „PISA 2018 Results. Where All Students Can Succeed“ (2019), S. 184
In Österreich waren es 74 %. (Quelle: OECD (Hrsg.), „PISA 2018 Results. Where All Students Can Succeed“ (2019), Table II.B1.9.2)