However, you can say:
* "Shabbat Shalom" - This is the most common and understood way to say it, as many French people are familiar with Hebrew phrases.
* "Bon Shabbat" - This translates to "Good Shabbat" and is a more French-sounding way to wish someone a good Shabbat.
* "Joyeux Shabbat" - This translates to "Happy Shabbat" and is another option that sounds more French.
You can also simply say:
* "Bon week-end" - This is a general way to wish someone a good weekend and is appropriate for anyone, even if they don't celebrate Shabbat.
The best way to say it depends on the context and your audience. If you are talking to someone who celebrates Shabbat, "Shabbat Shalom" or "Bon Shabbat" are good options. If you are not sure, "Bon week-end" is a safe and polite way to wish someone a good weekend.