To-Do app language settings

Hey guys,

We have been recently migrated to O365, but some of the web apps are still in a different language.

After setting PreferredLanguage AD attribute most of the apps are in English, but for some, the language settings had to be still manually changed in the web settings.

However, there is still one app - To-Do (https://to-do.office.com/tasks/?utm_source=applauncher) which doesn't have language settings and is still displayed in a local language instead of English.

Display language and preferred language are both set to English.

I've found also other settings for SharePoint which are as well set to English.

https://preview.redd.it/ago0a2mmxey51.png?width=767&format=png&auto=webp&s=5b9e55fd82b974052ee2bba0128341fb855b8d6f

Do you know which attribute affects To-Do application or what else should be changed?

Thank you in advance!