The following people and organizations have directly contributed material to the vocabulary:

- Harri Järvi
- Tero Kuparinen
- Kalle Lampila
- Teemu Likonen
- Jouni Pirttimäki
- Harri Pitkänen
- Ville Talikka
- Reijo Tomperi
- Tiina Vartio
- Hannu Väisänen
- Jouni Väliaho
- Statistics Finland

Additionally, the following sources have been used during the development
of the vocabulary:

- Hunspell-fi vocabulary
  Authors: Jarno Kiuttu, Reijo Tomperi, Harri Pitkänen
  License: GPL
  Year of publication: 2005

- Finnish ispell vocabulary
  Authors: Martin Vermeer, Pauli Virtanen
  License: GPL
  Year of publication: 2000
  URL: http://ispell-fi.sourceforge.net/index.html

- Finnish myspell vocabulary
  Authors: Jukka Nikulainen
  License: GPL
  Year of publication: 2005
  URL: http://www.mv.helsinki.fi/home/jnikulai/projects/index.html

- The list of words in modern Finnish, version 1
  Authors: Research Institute for the Languages of Finland
  License: LGPL
  Year of publication: 2006
  URL: http://kaino.kotus.fi/sanat/nykysuomi/