Pardon my français, but I have no idea what you just said.

Pardon mon français, but could you repeat that?

Pardon my Francais, but I think you're mistaken.

Pardon mon Francais, but I think you meant to say 'excuse my French'.

Excuse my francais, but I think you're mistaken.

Excuse my Francais, but I think your idea is not very practical.

Her last name is Francese.

The Franceses are visiting Paris.

The Franchinis are a famous Italian family.

My friend's last name is Franchini.