Nuspell is a free and open source spell checker library and command-line program designed for languages with rich morphology and complex word compounding. Nuspell is a pure C++ re-implementation of Hunspell.

Main features of Nuspell spell checker:

  • Full unicode support backed by ICU
  • Backward compatibility with Hunspell dictionary file format
  • Twofold affix stripping (for agglutinative languages, like Azeri, Basque, Estonian, Finnish, Hungarian, Turkish, etc.)
  • Support complex compounds (for example, Hungarian, German and Dutch)
  • Support language specific features (for example, special casing of Azeri and Turkish dotted i, or German sharp s)
  • Handle conditional affixes, circumfixes, fogemorphemes, forbidden words, pseudoroots and homonyms.
  • Free software. Licensed under GNU LGPL v3 or later.