what's
slangworld/slang 2.3.3-1 [installed]
S-Lang is a powerful interpreted language
then tried
$ slang
bash: slang: command not found
Honestly don't feel do its installation, please tell all about it. Thanks !
You've already got it installed.
Use
pacman -Ql slang
To see what the package has installed.
....
/usr/bin/slsh
...
It has a man page
man slsh
and a page on wikipedia
https://en.wikipedia.org/wiki/S-Lang