Good evening Nicolas and welcome back!
Thank you for reaching out to us and sharing the good news for everyone’s benefit.
We did run quite a few extensive tests ourselves (with Polylang Pro) and for the most part, the Events Calendar and the Events Calendar Pro are running great (minus a few details).
I know for a fact that some of our customers have also been successful using Polylang alongside our other plugins such as Event Tickets, Event Tickets Plus, Community Events and Filter Bar.
However, that last list has not been extensively tested on our end yet.
We would love to get feedback from users on their experience too.
Best regards,
Geoff B.