pybabelfish: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/pybabelfish - from package: python-nwsclient

You may install the required package with command apt-get install {package}

Error in other languages:
pybabelfish: bevel nie gevind nie
pybabelfish: comandă negăsită
pybabelfish: comando não encontrado
pybabelfish: commande introuvable
pybabelfish: command not found
pybabelfish: käsku ei ole
pybabelfish: không tìm thấy lệnh
pybabelfish: komanda nerasta
pybabelfish: Kommando nicht gefunden.
pybabelfish: kommandot finns inte
pybabelfish: komut yok
pybabelfish: nie znaleziono polecenia
pybabelfish: níor aimsíodh an t-ordú
pybabelfish: no se encontró la orden
pybabelfish: no s'ha trobat l'ordre
pybabelfish: opdracht niet gevonden
pybabelfish: parancs nem található
pybabelfish: perintah tidak ditemukan
pybabelfish: príkaz nenájdený
pybabelfish: příkaz nenalezen
pybabelfish: команда не найдена
pybabelfish: командата не е открита
pybabelfish: 命令找不到
pybabelfish: コマンドが見つかりません