- Change the Google Ads account language setting to French during setup
- Change the managed placements to French
- Target specific YouTube localized domains
- Set language targeting options for the campaign containing the ads for the film
Explanation: Your ads are targeted to reach a certain audience, based on your chosen language targeting options. With this information, AdWords works to ensure that your ad appears to your chosen audience.
Read more here: https://support.google.com/partners/answer/2740757?hl=en