Background: Oral language competence provides children with an essential foundation for academic achievement and emotional well-being, yet many children enter school with delayed language and those living in economically disadvantaged areas are at disproportionate risk of experiencing language difficulties. A tiered system, offering high-quality language teaching for all children in early years classrooms, is widely acknowledged as an appropriate means of supporting language learning need. An understanding of the current quality of language supporting practices in English early years settings is essential to inform teaching practice and professional development, but evidence is limited. Methods: This study employed the Communication Supporting Classroom Observation tool in 39 nursery classrooms in economically disadvantaged areas of England to identify strengths of practice and key areas for development. Results: Observations revealed well-equipped physical learning environments and responsive teaching practices, but few structured opportunities for language learning and development. Variation in quality was observed across the nursery session. Conclusions: Findings suggest a need for adaptive professional development programmes supporting the more consistent use of structured language learning opportunities, the enhanced use of interaction promoting strategies and the provision of more complex and contingent language models. Further investigation of language supporting practice at a fine-grained level is desirable.