hunspell

About hunspell

From Debian's package description

Hunspell is a spell checker and morphological analyzer library and program designed for languages with rich morphology and complex word compounding or character encoding. It is based on MySpell and features an Ispell-like terminal interface using Curses library, an Ispell pipe interface and an OpenOffice.org UNO module.

Main features:

• Unicode support (first 65535 Unicode characters)
• morphological analysis (in custom item and arrangement style)
• Max. 65535 affix classes and twofold affix stripping (for agglutinative languages, like Azeri, Basque, Estonian, Finnish, Hungarian, Turkish, etc.)
• Support complex compoundings (for example, Hungarian and German)
• Support language specific algorithms (for example, handling Azeri and Turkish dotted i, or German sharp s)
• Handling conditional affixes, circumfixes, fogemorphemes, forbidden words, pseudoroots and homonyms.

This package contains the program with the Ispell-like terminal and pipe interfaces.

From Debian's description of the hunspell package, under that package's license.