apertium-multiple-translations: 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-multiple-translations - from package: apertium

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

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