dillo-install-hyphenation: 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/dillo-install-hyphenation - from package: dillo

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

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