Public access: group name doesn't change according to meeting language

[MSoeb]

Describe the bug
If public access is activated, a new group called 'Public' is displayed in the group menu. The name of the group does not depend on the language setting for the meeting.

How to Reproduce
Steps to reproduce the behavior:

1. open an instance
2. open committees > create a committee
3. create a meeting in german language
4. open settings on orga level > activate public mode
5. open meeting > open settings > activate public mode
6. open participants > check group menu

Expected behavior
Depending on the language in which a meeting was created, the name of the 'Public' group should vary accordingly. Please take account to all supported languages.

Example:
German = 'Öffentlich'