Will we have to opt a compulsory foreign language in UPSC/IFS (Main) exam? (or) Just knowledge of a foreign language at UG/PG/Diploma sufficient to get job in Indian Embassy as IFS officer?

hello sir/mam
Do we have to opt for a Compulsory Foreign Language in the UPSC/IFS main examination or just the knowledge of a Foreign language at UG/PG/Diploma level sufficient to get a job in Indian Embassy?

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