dictfmt_index2word: 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/dictfmt_index2word - from package: dictfmt

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

Error in other languages:
dictfmt_index2word: bevel nie gevind nie
dictfmt_index2word: comandă negăsită
dictfmt_index2word: comando não encontrado
dictfmt_index2word: commande introuvable
dictfmt_index2word: command not found
dictfmt_index2word: käsku ei ole
dictfmt_index2word: không tìm thấy lệnh
dictfmt_index2word: komanda nerasta
dictfmt_index2word: Kommando nicht gefunden.
dictfmt_index2word: kommandot finns inte
dictfmt_index2word: komut yok
dictfmt_index2word: nie znaleziono polecenia
dictfmt_index2word: níor aimsíodh an t-ordú
dictfmt_index2word: no se encontró la orden
dictfmt_index2word: no s'ha trobat l'ordre
dictfmt_index2word: opdracht niet gevonden
dictfmt_index2word: parancs nem található
dictfmt_index2word: perintah tidak ditemukan
dictfmt_index2word: príkaz nenájdený
dictfmt_index2word: příkaz nenalezen
dictfmt_index2word: команда не найдена
dictfmt_index2word: командата не е открита
dictfmt_index2word: 命令找不到
dictfmt_index2word: コマンドが見つかりません