Possible Clues:

• Mon Oncle, the film
• A type of toast, in a manner of speaking
• From Paris possibly
• Finnish, we hear, from these languages?
• Further issues might arise if this billet were not to be occupied
• Polish language
• Word that can precede the starts of 20-, 28-, 46- and 57-Across
• See 16
• "Pardon my __"
• Lorraine language