change-po-charset: 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/change-po-charset - from package: potool

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

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