Case T-437/16: Judgment of the General Court of 9 September 2020 — Italy v Commission (Language regime — Notice of open competition for the recruitment of administrators in the field of audit — Language knowledge — Limitation of the choice of second language to German, English and French — Language for communication — Regulation No 1 — Article 1d(1), Article 27 and Article 28(f) of the Staff Regulations — Discrimination on grounds of language — Justification — Interest of the service — Proportionality)