Pepe Le Pew breaks the fourth wall in his best Charles Boyer like imitation.
The characters speak a combination of French and English which would be colloquially known as Franglais, in the same vein as Spanglish. Most cultures have such a mixed informal form of words.
The gendarme shouts "Sacre Cerise!" which is a play on the French oath "Sacre Bleu!"
The title is a play on "for sentimental reasons".