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diff --git a/sphinx/search/sv.py b/sphinx/search/sv.py
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+"""Swedish search language: includes the JS Swedish stemmer."""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Dict
+
+import snowballstemmer
+
+from sphinx.search import SearchLanguage, parse_stop_word
+
+swedish_stopwords = parse_stop_word('''
+| source: http://snowball.tartarus.org/algorithms/swedish/stop.txt
+och            | and
+det            | it, this/that
+att            | to (with infinitive)
+i              | in, at
+en             | a
+jag            | I
+hon            | she
+som            | who, that
+han            | he
+på             | on
+den            | it, this/that
+med            | with
+var            | where, each
+sig            | him(self) etc
+för            | for
+så             | so (also: seed)
+till           | to
+är             | is
+men            | but
+ett            | a
+om             | if; around, about
+hade           | had
+de             | they, these/those
+av             | of
+icke           | not, no
+mig            | me
+du             | you
+henne          | her
+då             | then, when
+sin            | his
+nu             | now
+har            | have
+inte           | inte någon = no one
+hans           | his
+honom          | him
+skulle         | 'sake'
+hennes         | her
+där            | there
+min            | my
+man            | one (pronoun)
+ej             | nor
+vid            | at, by, on (also: vast)
+kunde          | could
+något          | some etc
+från           | from, off
+ut             | out
+när            | when
+efter          | after, behind
+upp            | up
+vi             | we
+dem            | them
+vara           | be
+vad            | what
+över           | over
+än             | than
+dig            | you
+kan            | can
+sina           | his
+här            | here
+ha             | have
+mot            | towards
+alla           | all
+under          | under (also: wonder)
+någon          | some etc
+eller          | or (else)
+allt           | all
+mycket         | much
+sedan          | since
+ju             | why
+denna          | this/that
+själv          | myself, yourself etc
+detta          | this/that
+åt             | to
+utan           | without
+varit          | was
+hur            | how
+ingen          | no
+mitt           | my
+ni             | you
+bli            | to be, become
+blev           | from bli
+oss            | us
+din            | thy
+dessa          | these/those
+några          | some etc
+deras          | their
+blir           | from bli
+mina           | my
+samma          | (the) same
+vilken         | who, that
+er             | you, your
+sådan          | such a
+vår            | our
+blivit         | from bli
+dess           | its
+inom           | within
+mellan         | between
+sådant         | such a
+varför         | why
+varje          | each
+vilka          | who, that
+ditt           | thy
+vem            | who
+vilket         | who, that
+sitta          | his
+sådana         | such a
+vart           | each
+dina           | thy
+vars           | whose
+vårt           | our
+våra           | our
+ert            | your
+era            | your
+vilkas         | whose
+''')
+
+
+class SearchSwedish(SearchLanguage):
+    lang = 'sv'
+    language_name = 'Swedish'
+    js_stemmer_rawcode = 'swedish-stemmer.js'
+    stopwords = swedish_stopwords
+
+    def init(self, options: dict) -> None:
+        self.stemmer = snowballstemmer.stemmer('swedish')
+
+    def stem(self, word: str) -> str:
+        return self.stemmer.stemWord(word.lower())