AlphaZulu

I myself am not aware of any French speaking stations dedicated to ETS2MP/ATSMP, however I am pretty sure truckersfm and perhaps other radio stations do have non-English presenters which do air sometimes. However, the easier option to view traffic is to rely on websites such as https://traffic.krashnz.com/ or http://ets2map.com/ , which both provide a view of traffic in a way that users from any language can read. Or just listen to truckersfm (other stations are available) in English. That also works.