apertium-pretransfer: 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/apertium-pretransfer - from package: apertium

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

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