To manage installations/updates/uninstallations with the system tool apt, declare the W repository:

apt update
apt install ca-certificates curl
curl -fsSL http://apt.lanisys.fr/public.key -o /etc/apt/keyrings/wlanguage.gpg
tee /etc/apt/sources.list.d/wlanguage.sources <<EOF
Types: deb
URIs: http://apt.lanisys.fr
Suites: $(. /etc/os-release && echo "$VERSION_CODENAME")
Components: main
Signed-By: /etc/apt/keyrings/wlanguage.gpg
EOF
apt update

Then install W :

apt install wlanguage

Note: To manually install a .deb file, navigate to the deb file's directory, and so on :

# example
sudo apt install ./wlanguage_0.5.0-1~trixie_amd64.deb

Run the installer as administrator.
To uninstall W, go to the directory C:\Program Files\wLanguage and run uninstall.bat as administrator.

For fun, here's the code for the program that calculates the hash in W :

hash.w

begin
    declare file, md5, path
    let file = ''
    let md5 = ''
    let path = field(@arg, @fm, 2)
    part 1
    invoke file&get(path, file)
    part 2
    invoke hash&MD5(file, md5)
    echonl 'MD5 => ':md5
except
    if @part = 1 then
        echonl 'Cannot open file ':path
    endif
end