[LUCENE-7420] SpanishLightStemmer stemming errors

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: modules/analysis
• Labels: analysis stemming
• Lucene Fields: New, Patch Available
• Assignee: Unassigned
• Reporter: J Pardos
• Created: 19/Aug/16 09:25
• Updated: 28/Aug/22 15:02

Description

SpanishLightStemmer only applies stemming if the original word is 5 characters or longer. It tries to removing gender and numbers, removing final vowel and s if they exist.

So, perro, perra, perros and perras (dog, bitch, dogs and bitches) all become 'perr'.
The problem arises with shorter words. Gatos and Gatas (cats / female cats) all become 'gat', but the singular forms (gato, gata) are below the 5 character threshold, so they wouldn't be stemmed.