pt_BR: 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:

/var/spool/hylafax/bin/dict/pt_BR - from package: hylafax+

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

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