Probably/Possibly a typo in the german language files. @tecpromotion can you check please

There should no html be shown

This is probably a side effect of the HTML sanitization. Probably some German language string contains illegal HTML

Thanks. Will check and fix.

Closing as it is for German language only

@sandramay0905 please use the latest release https://github.com/joomlagerman/joomla/releases/tag/4.0.0v1-beta7
It no longer contains HTML. Switching without installing the German language package or installing completely in German will load an outdated language package.

@tecpromotion i use a fresh installation by launch.joomla.org + 3 languages (french, german, persian) and after switch backend language from english to german i got today the same issue.

@sandramay0905 unfortunately, this is not yet possible at this point in time. Language packages still have to be installed under Joomla 4. When switching, only an old Joomla 3 package is accessed.

The error comes from using wrong double quotes. Instead of straight double quotes, we have curly double quotes.
Weirdly enough, it does not show in 3.9

we should have
COM_LANGUAGES_MSG_DEFAULT_LANGUAGE_SAVED="[...]/<span style=\"text-decoration: underline; color: red;\">[...]"
But we have
<span style=\“text-decoration: underline; color: red;\“><strong>Warnung:</strong></span>

@tecpromotion : I suggest to release a corrected 3.9.26.2 pack.

@sandramay0905
German pack has been updated and issue corrected.

Thanks @infograf768. I was coming here cause i have seen it at this moment and wanted to report :-)