french-conjugator: 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/french-conjugator - from package: verbiste

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

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