Hello @Managor, this looks like #5704, what's does locale -a output?
$ locale -a
C
en_GB.utf8
fi_FI.utf8
POSIX
Thanks, as noted in that issue report, please add en_US.UTF-8 UTF-8 to /etc/locale.gen and run locale-gen as root to regenerate the system localizations, then restart Steam and retest to confirm this is a duplicate of #5704.
Yes, that got it working.
Nothing extracted yet.
Your system information
Please describe your issue in as much detail as possible:
The letters ÅÄÖ don't work in the Steam Chat
Demonstrative video: https://youtu.be/vuuQYe--Q70
System information: https://gist.github.com/Managor/498f5e6fd58a16291a99494005de90be