gettext: 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:

/bin/gettext - from package: gettext
/usr/bin/gettext - from package: gettext

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

On Debian possible default full paths are:

/usr/bin/gettext - from package: gettext-base

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

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