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diff --git a/sphinx/search/de.py b/sphinx/search/de.py
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+"""German search language: includes the JS German stemmer."""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Dict
+
+import snowballstemmer
+
+from sphinx.search import SearchLanguage, parse_stop_word
+
+german_stopwords = parse_stop_word('''
+|source: http://snowball.tartarus.org/algorithms/german/stop.txt
+aber           |  but
+
+alle           |  all
+allem
+allen
+aller
+alles
+
+als            |  than, as
+also           |  so
+am             |  an + dem
+an             |  at
+
+ander          |  other
+andere
+anderem
+anderen
+anderer
+anderes
+anderm
+andern
+anderr
+anders
+
+auch           |  also
+auf            |  on
+aus            |  out of
+bei            |  by
+bin            |  am
+bis            |  until
+bist           |  art
+da             |  there
+damit          |  with it
+dann           |  then
+
+der            |  the
+den
+des
+dem
+die
+das
+
+daß            |  that
+
+derselbe       |  the same
+derselben
+denselben
+desselben
+demselben
+dieselbe
+dieselben
+dasselbe
+
+dazu           |  to that
+
+dein           |  thy
+deine
+deinem
+deinen
+deiner
+deines
+
+denn           |  because
+
+derer          |  of those
+dessen         |  of him
+
+dich           |  thee
+dir            |  to thee
+du             |  thou
+
+dies           |  this
+diese
+diesem
+diesen
+dieser
+dieses
+
+
+doch           |  (several meanings)
+dort           |  (over) there
+
+
+durch          |  through
+
+ein            |  a
+eine
+einem
+einen
+einer
+eines
+
+einig          |  some
+einige
+einigem
+einigen
+einiger
+einiges
+
+einmal         |  once
+
+er             |  he
+ihn            |  him
+ihm            |  to him
+
+es             |  it
+etwas          |  something
+
+euer           |  your
+eure
+eurem
+euren
+eurer
+eures
+
+für            |  for
+gegen          |  towards
+gewesen        |  p.p. of sein
+hab            |  have
+habe           |  have
+haben          |  have
+hat            |  has
+hatte          |  had
+hatten         |  had
+hier           |  here
+hin            |  there
+hinter         |  behind
+
+ich            |  I
+mich           |  me
+mir            |  to me
+
+
+ihr            |  you, to her
+ihre
+ihrem
+ihren
+ihrer
+ihres
+euch           |  to you
+
+im             |  in + dem
+in             |  in
+indem          |  while
+ins            |  in + das
+ist            |  is
+
+jede           |  each, every
+jedem
+jeden
+jeder
+jedes
+
+jene           |  that
+jenem
+jenen
+jener
+jenes
+
+jetzt          |  now
+kann           |  can
+
+kein           |  no
+keine
+keinem
+keinen
+keiner
+keines
+
+können         |  can
+könnte         |  could
+machen         |  do
+man            |  one
+
+manche         |  some, many a
+manchem
+manchen
+mancher
+manches
+
+mein           |  my
+meine
+meinem
+meinen
+meiner
+meines
+
+mit            |  with
+muss           |  must
+musste         |  had to
+nach           |  to(wards)
+nicht          |  not
+nichts         |  nothing
+noch           |  still, yet
+nun            |  now
+nur            |  only
+ob             |  whether
+oder           |  or
+ohne           |  without
+sehr           |  very
+
+sein           |  his
+seine
+seinem
+seinen
+seiner
+seines
+
+selbst         |  self
+sich           |  herself
+
+sie            |  they, she
+ihnen          |  to them
+
+sind           |  are
+so             |  so
+
+solche         |  such
+solchem
+solchen
+solcher
+solches
+
+soll           |  shall
+sollte         |  should
+sondern        |  but
+sonst          |  else
+über           |  over
+um             |  about, around
+und            |  and
+
+uns            |  us
+unse
+unsem
+unsen
+unser
+unses
+
+unter          |  under
+viel           |  much
+vom            |  von + dem
+von            |  from
+vor            |  before
+während        |  while
+war            |  was
+waren          |  were
+warst          |  wast
+was            |  what
+weg            |  away, off
+weil           |  because
+weiter         |  further
+
+welche         |  which
+welchem
+welchen
+welcher
+welches
+
+wenn           |  when
+werde          |  will
+werden         |  will
+wie            |  how
+wieder         |  again
+will           |  want
+wir            |  we
+wird           |  will
+wirst          |  willst
+wo             |  where
+wollen         |  want
+wollte         |  wanted
+würde          |  would
+würden         |  would
+zu             |  to
+zum            |  zu + dem
+zur            |  zu + der
+zwar           |  indeed
+zwischen       |  between
+''')
+
+
+class SearchGerman(SearchLanguage):
+    lang = 'de'
+    language_name = 'German'
+    js_stemmer_rawcode = 'german-stemmer.js'
+    stopwords = german_stopwords
+
+    def init(self, options: dict) -> None:
+        self.stemmer = snowballstemmer.stemmer('german')
+
+    def stem(self, word: str) -> str:
+        return self.stemmer.stemWord(word.lower())