ARM Request Mail Language

We use different OpenOrder Tempaltes and Open Templates for Request Workflows and this works fine so far.

The Mails to the Requester are normally send in the language the requester is currently logged into ARM Webgui.

But the Mails to the next approver or admin are typically send in english.

How is the language for the next approver defined?

Can the default language be adjusted?

Thanks a lot for your help.

Best Regards