Hi Thierry,
the files have been created on this same machine which has the issue, so directly on
Linux.
I have, at least for the moment, avoided to install every available font from the repos,
as I have limited space, even if I thought of giving it a shot.
I already tested creating a new user and changing the theme, as deloptes instructed me to
test it, but it didn't solve nothing.
The guys at Q4OS forum told me these exact words:
"We have performed some testing and we can confirm a bug in Trinity desktop related
to UTF-8 named files. While the file names are displayed correctly in Plasma applications
and desktop, the same file names shows unknown characters in Trinity apps.
We have also made testing on pure Debian/TDE installation with the same result. So the bug
is not native Q4OS, but Trinity desktop one. We would suggest you to report it for Trinity
developers directly
https://trinitydesktop.org/ . Thanks for reporting."
This is why I came here reporting this issue.
Regards