goldendict: 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/goldendict - from package: goldendict

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

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