With regard to vocabulary, many children fall behind their peers already at young ages …

„With regard to vocabulary, many children fall behind their peers already at young ages.  This is particularly challenging as vocabulary is linked to the development of receptive and productive oral language proficiency and reading skills and thus to opportunities for academic success and social participation.“
Dr. Anja Linberg u. a., The Early Years Home Learning Environment – Associations With Parent-Child-Course Attendance and Children’s Vocabulary at Age 3 (2020), S. 9.