English
Two sources are combined. The English Speller Database (ESDB, also known as SCOWL), release 2026.02.25, Copyright 2000-2026 Kevin Atkinson, used under the permission notice in the file linked below (the copyright notice has to appear in all copies). The list is taken from the database at size 85 (including rare and archaic words) with the American, British (-ise and -ize), Canadian and Australian spellings, without abbreviations, names and Roman numerals. It is combined with the ENABLE word list (enable1.txt), which is in the public domain. Only entries written in lowercase are used, accents are removed and words outside 2 to 15 letters are left out.
Nederlands
OpenTaal Nederlandse woordenlijst, version 2.20.23 (2023-03-10), combined with the OpenTaal Hunspell dictionary nl_NL, version 2.20.23 (2023-03-10), with its affix rules expanded. Copyright OpenTaal (Simon Brouwer, Sander van Geloven, Ruud Baars and others). Licensed under the Revised BSD License and/or CC BY 3.0. Only entries written entirely in lowercase are used, accents are removed and words outside 2 to 15 letters are left out.
Deutsch
de_DE_frami dictionary (version 20161207+frami20170109), derived from igerman98. Copyright 1998-2017 Björn Jacke, Franz Michael Baumann and others. Licensed under the GNU GPL, version 2 or 3. The German word list on this site is derived from that dictionary (affix rules expanded into full word forms, entries used only inside compounds left out, ß written as ss, words outside 2 to 15 letters left out) and is made available under the same licence. The complete list can be downloaded below.
Français
Dictionnaire orthographique français “classique” v7.7 (Hunspell, fr_FR), by Olivier R., from the Grammalecte / Dicollecte project. Licensed under the Mozilla Public License 2.0. The French word list on this site is derived from that dictionary (affix rules expanded into full word forms, only entries written in lowercase, accents removed, words outside 2 to 15 letters left out) and is made available under the same licence. The complete list can be downloaded below.
Español
Diccionario para corrección ortográfica en español (Hunspell, es_ES) of the LibreOffice dictionaries project, started by Santiago Bosio. It is offered under a triple licence (GNU GPL v3 or later, GNU LGPL v3 or later, or MPL 1.1 or later) and is used here under the MPL 1.1 or later. The Spanish word list on this site is derived from it (affix rules expanded into full word forms, only entries written in lowercase, accents removed but the ñ kept, words outside 2 to 15 letters left out) and is made available under the same licence. The complete list can be downloaded below.