Possible Clues:

• Crazy angle about leaders giving up argument with English
• Speech of film director getting fashionable over time
• English or Latin
• Tongue of monkey shortened over time
• See 23
• French, for instance, finishing with 15 across
• Communication system
• Urdu, for one
• You might mind it during congress with prude
• Profanity? There's a way to accommodate restriction on speech around University