Judgment of the Court (First Chamber) of 12 February 2026.#VšĮ „Vilniaus tarptautinė mokykla“ v Valstybinė kalbos inspekcija.#Reference for a preliminary ruling – Article 49 TFEU – Freedom of establishment – Scope – Economic activity – Recognition of professional qualifications – Directive 2005/36/EC – Article 53 – Knowledge of languages – National legislation laying down a requirement that teachers and the members of administrative staff in regular communication with the public and with the administrative authorities employed in a private educational institution are proficient in the official language – Article 4(2) TEU – National identity of a Member State – Protection and promotion of the official language of a Member State – Private educational institution delivering international education programmes – Necessity condition – Principle of proportionality – Requirement of proficiency in the official language with no possibility for exception or flexibility.#Case C-48/24.