dl10n-check: 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/dl10n-check - from package: dl10n

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

Error in other languages:
dl10n-check: bevel nie gevind nie
dl10n-check: comandă negăsită
dl10n-check: comando não encontrado
dl10n-check: commande introuvable
dl10n-check: command not found
dl10n-check: käsku ei ole
dl10n-check: không tìm thấy lệnh
dl10n-check: komanda nerasta
dl10n-check: Kommando nicht gefunden.
dl10n-check: kommandot finns inte
dl10n-check: komut yok
dl10n-check: nie znaleziono polecenia
dl10n-check: níor aimsíodh an t-ordú
dl10n-check: no se encontró la orden
dl10n-check: no s'ha trobat l'ordre
dl10n-check: opdracht niet gevonden
dl10n-check: parancs nem található
dl10n-check: perintah tidak ditemukan
dl10n-check: príkaz nenájdený
dl10n-check: příkaz nenalezen
dl10n-check: команда не найдена
dl10n-check: командата не е открита
dl10n-check: 命令找不到
dl10n-check: コマンドが見つかりません