rspamd/contrib/snowball/libstemmer/modules.txt

# This file contains a list of stemmers to include in the distribution.
# The format is a set of space separated lines - on each line:
#  First item is name of stemmer.
#  Second item is comma separated list of character sets.
#  Third item is comma separated list of names to refer to the stemmer by.
#
# Lines starting with a #, or blank lines, are ignored.

# List all the main algorithms for each language, in UTF-8, and also with
# the most commonly used encoding.

arabic          UTF_8                   arabic,ar,ara
danish          UTF_8        danish,da,dan
dutch           UTF_8        dutch,nl,dut,nld
english         UTF_8        english,en,eng
finnish         UTF_8        finnish,fi,fin
french          UTF_8        french,fr,fre,fra
german          UTF_8        german,de,ger,deu
greek           UTF_8                   greek,el,gre,ell
hindi           UTF_8                   hindi,hi,hin
hungarian       UTF_8        hungarian,hu,hun
indonesian      UTF_8        indonesian,id,ind
italian         UTF_8        italian,it,ita
lithuanian      UTF_8                   lithuanian,lt,lit
nepali          UTF_8                   nepali,ne,nep
norwegian       UTF_8        norwegian,no,nor
portuguese      UTF_8        portuguese,pt,por
romanian        UTF_8        romanian,ro,rum,ron
russian         UTF_8            russian,ru,rus
serbian         UTF_8                   serbian,sr,srp
spanish         UTF_8        spanish,es,esl,spa
swedish         UTF_8        swedish,sv,swe
tamil           UTF_8                   tamil,ta,tam
turkish         UTF_8                   turkish,tr,tur

# Also include the traditional porter algorithm for english.
# The porter algorithm is included in the libstemmer distribution to assist
# with backwards compatibility, but for new systems the english algorithm
# should be used in preference.
porter          UTF_8        porter			english

# Some other stemmers in the snowball project are not included in the standard
# distribution. To compile a libstemmer with them in, add them to this list,
# and regenerate the distribution. (You will need a full source checkout for
# this.) They are included in the snowball website as curiosities, but are not
# intended for general use, and use of them is is not fully supported.  These
# algorithms are:
#
# german2          - This is a slight modification of the german stemmer.
#german2          UTF_8,ISO_8859_1        german2		german
#
# kraaij_pohlmann  - This is a different dutch stemmer.
#kraaij_pohlmann  UTF_8,ISO_8859_1        kraaij_pohlmann	dutch
#
# lovins           - This is an english stemmer, but fairly outdated, and
#                    only really applicable to a restricted type of input text
#                    (keywords in academic publications).
#lovins           UTF_8,ISO_8859_1        lovins		english