Originally Posted by ShellShock
Something broke between 2.1.5 and 2.4.0 in how the Kobo finds fonts, to do with the font naming and the device's locale. This should be fixed by Kobo, but at least we now have a workaround.
Calling something a bug that needs to be fixed that requires a totally non-standard change to the device (setting the locale) seems a bit much.
I'd rather see effort go into fixing real issues using the devices as intended by the manufacturer.