The language passed to the stemmer is inferred using name(language(d)) where d is an AbstractDocument. This is a language name in that language, e.g., "русский" for Russian. Snowball stemmer, however, requires an English name or an ISO code:
The algorithm may be selected using the english name of the
language, or using the 2 or 3 letter ISO 639 language codes.
The language passed to the stemmer is inferred using
name(language(d))wheredis anAbstractDocument. This is a language name in that language, e.g.,"русский"for Russian. Snowball stemmer, however, requires an English name or an ISO code:This fix infers English language name.
(Tested only on Russian).