The UPSC Mains 2023 languages exam will be held on September 23. Paper A, which covers Indian languages, will take place from 9AM to 12 Noon, while Paper B, which covers English, will be held from 2PM to 5PM. The language papers are qualifying papers and include essay writing, reading comprehension, precis writing, and translation tasks. Candidates are advised to choose a language they are proficient in and to prioritize questions they are confident in.