Arch based

You need to add our repository key

wget -O repository.key https://git.tesses.org/api/packages/tesses50/arch/repository.key
sudo pacman-key --add repository.key

Add this to your /etc/pacman.conf

[tesses50.git.tesses.org]
SigLevel = Optional TrustAll
Server = https://git.tesses.org/api/packages/tesses50/arch/core/$arch

or run this command which will do the same thing

printf "[tesses50.git.tesses.org]\nSigLevel = Optional TrustAll\nServer = https://git.tesses.org/api/packages/tesses50/arch/core/\$arch\n" | sudo tee -a /etc/pacman.conf

Install crosslang

sudo pacman -Sy crosslang