In Estonia language classes are provided to all those in pre-primary school who do not speak Estonian at home …

„In Estonia language classes are provided to all those in pre-primary school who do not speak Estonian at home. In the Netherlands, children from disadvantaged backgrounds between the ages of two and a half and four are entitled to ten hours of language development per week, which has been assessed as highly beneficial.“
OECD (Hrsg.), OECD Economic Surveys: Austria 2024 (2024), S. 76.