mtkbabel: 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/mtkbabel - from package: mtkbabel

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

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