mono-locale-extras from home:FlyingDutchman project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:FlyingDutchman/openSUSE_Tumbleweed/home:FlyingDutchman.repo zypper refresh zypper install mono-locale-extras
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:FlyingDutchman/15.4/home:FlyingDutchman.repo zypper refresh zypper install mono-locale-extras