Case T-554/19: Judgment of the General Court of 8 September 2021 — Spain v Commission (Rules on languages — Notice of open competition for the recruitment of administrators in the fields of competition law, financial law, economic and monetary union law, financial rules applicable to the EU budget, and protection of euro coins against counterfeiting — Restriction of the choice of language 2 of the competition to four 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)