If you want to contribute to the translation of #FediPlan, here is the link:
https://hosted.weblate.org/projects/fediplan/
More about the app: https://fedilab.app/projects/fediplan-app/
#FDroid : https://f-droid.org/packages/app.fedilab.fediplan/
We will make it available soon for iOS.
Thank you for your help