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esperanto_stemmer

The esperanto_stemmer is an Elasticsearch filter that provides stemming for the Esperanto language.

Analyzer Notes

  • Folding: If you use generic folding (ICU folding conveniently handles both combining and precomposed diacrtics), be sure not to fold Ĉ/ĉ, Ĝ/ĝ, Ĥ/ĥ, Ĵ/ĵ, Ŝ/ŝ, and Ŭ/ŭ which should be kept distinct from C/c, G/G. H/h, J/j, S/s, and U/u. See more about Esperanto orthogrpahy on Wikipedia.
  • Transliterations: The stemmer does not support H-system or X-system transliterations. This affect stemming exceptions and number recognition.

Implementation History

  • The original implementation in Java is "Esperanto Stemmer", by Declan Whitford Jones.

  • That stemmer was wrapped into this Elasticsearch plugin by Trey Jones to provide the esperanto_stemmer filter.