xliff2po: 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 CentOS possible default full paths are:

/usr/bin/xliff2po - from package: translate-toolkit

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/xliff2po - from package: translate-toolkit

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

Error in other languages:
xliff2po: bevel nie gevind nie
xliff2po: comandă negăsită
xliff2po: comando não encontrado
xliff2po: commande introuvable
xliff2po: command not found
xliff2po: käsku ei ole
xliff2po: không tìm thấy lệnh
xliff2po: komanda nerasta
xliff2po: Kommando nicht gefunden.
xliff2po: kommandot finns inte
xliff2po: komut yok
xliff2po: nie znaleziono polecenia
xliff2po: níor aimsíodh an t-ordú
xliff2po: no se encontró la orden
xliff2po: no s'ha trobat l'ordre
xliff2po: opdracht niet gevonden
xliff2po: parancs nem található
xliff2po: perintah tidak ditemukan
xliff2po: príkaz nenájdený
xliff2po: příkaz nenalezen
xliff2po: команда не найдена
xliff2po: командата не е открита
xliff2po: 命令找不到
xliff2po: コマンドが見つかりません