Comment 23 for bug 1873466

As said in Ubuntu-Mate forum, /usr/share/applications/*.desktop and
/usr/share/mate/desktop-directories/*.directory files have translations for some languages, (including english and affects sl, nl and pt languages) and it's not gonna work because all icons packs have icons names in english by default. So the workarround is remove all entries that start with "Icon["

sudo sed -i '/Icon\[/d' /usr/share/applications/*.desktop
sudo sed -i '/Icon\[/d' /usr/share/mate/desktop-directories/*.directory
sudo update-desktop-database