freefoam-changeDictionary: 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/freefoam-changeDictionary - from package: freefoam

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

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