[LUCENE-9687] Hunspell support improvements

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 9.0, 8.9
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Peter Gromov
• Created: 21/Jan/21 11:57
• Updated: 28/Aug/22 16:13
• Resolved: 15/Mar/21 16:45

Description

I'd like Lucene's Hunspell support to be on a par with the native C++ Hunspell for spellchecking and suggestions, at least for some languages. So I propose to:

• support the affix rules necessary for English, German, French, Spanish and
  Russian dictionaries, possibly more languages later
• mirror Hunspell's suggestion algorithm in Lucene
• provide a public APIs for spellchecking, suggestion, stemming, morphological data
• check corpora for specific languages to find and fix spellchecking/suggestion discrepancices between Lucene's implementation and Hunspell/C++

Issue Links

• links to: GitHub Pull Request #2451
• links to: GitHub Pull Request #2499