Case T-71/18: Judgment of the General Court of 2 June 2021 — Italy v Commission (Rules on languages — Notice of Open Competition for the recruitment of administrators in the fields of financial economics and macroeconomics — Knowledge of languages — Restriction of the choice of language 2 of the competition to three languages — Regulation No 1 — Article 1d(1), Article 27 and Article 28(f) of the Staff Regulations — Discrimination based on language — Interests of the service — Proportionality)