Switching the language of KMail via Help -> Switch Application Language does not affect the language of systray notifications. Reproducible: Always Steps to Reproduce: 1. Switch language 2. Send an email Actual Results: The notification of a successful delivery is still in your default language. Expected Results: The notification of a successful delivery (and all other notifications) is in the selected language.
Not sure if it's possible to do it. There is two process: - KMail - newmailnotifier => you change it in kmail but it will not change other process...
Wouldn't it possible to simply restart newmailnotifier with the language prefix, eg "LANG=de_DE.UTF-8 newmailnotifier" ?
I think what Laurent is says is that the notifications are in the language of the workspace, since their trigger is not one single application in particular. Like when you copy files and you get a progress notification, it is always the same kind of notification no matter if you started the copy in Dolphin or Konqueror or through kioclient in a terminal. Similar any program sending a mail, e.g. KOrganizer when sending out event invitations, will do that through the same service and trigger the same "mail sent" notification popup.
For me it's not possible to fix it.