How to display date with timezone in the right language

Hello,
I managed to add the timezone as a second parameter of the date filter (but this not explained anywhere, this doc does not work, I don’t know where to find relevant doc)
For example {{customer._created_in_customerio_at | date: "%H:%M %A %b %d, %Y" , "Europe/London" }}

But I’m stuck to display the timezone with the %Z: "%H:%M %A %b %d, %Y %Z" (got it from this doc https://customer.io/blog/easy-date-formatting-with-liquid/) => it gets “12:50 Monday Apr 08, 2024 %Z”


And I’d like to display the month and day in the users language, but did not find how. I tried:
{{customer._created_in_customerio_at | date: "%H:%M %A %b %d, %Y" , "Europe/London" | language: "fr" }} => 
{{customer._created_in_customerio_at | date: "%H:%M %A %b %d, %Y" , "Europe/London", "fr" }}

{{customer._created_in_customerio_at | date: "%H:%M %A %b %d, %Y" , "Europe/London", "FR-fr" }}
 

Please help :D 

Thanks