I looked at the Asturian keyboard layout chart and can't see a way to add the accented characters unless it uses dead keys (the keyboard layout chart doesn't illustrate those), so I haven't verified that problem.
I had no problem creating a folder named /tmp/áéíóúü using my English (multilingual) keyboard in Gnome-Terminal even using the ast_ES.UTF-8 locale, and it shows correctly in the Gnome-Terminal window title in other locales. I strongly suspect they are two separate problems, although the origin of both may be errors in the locale definition.
@ivarela
I looked at the Asturian keyboard layout chart and can't see a way to add the accented characters unless it uses dead keys (the keyboard layout chart doesn't illustrate those), so I haven't verified that problem.
I had no problem creating a folder named /tmp/áéíóúü using my English (multilingual) keyboard in Gnome-Terminal even using the ast_ES.UTF-8 locale, and it shows correctly in the Gnome-Terminal window title in other locales. I strongly suspect they are two separate problems, although the origin of both may be errors in the locale definition.