FCM background message, translation and device locale

[QuentinSc]

Hello,

I'm using Firebase Cloud Messaging to send notifications and I need to translate the notifications depending the device locale.
If the app is in foreground, no prob I can get the device locale.
But when the app is in background I can't get the device locale with the flutter way (because the code is isolated).
What are the recommandations for this use case ?

Thank you !