diff --git a/openedx/core/djangoapps/dark_lang/middleware.py b/openedx/core/djangoapps/dark_lang/middleware.py
index 5ca1c72052ef..72ecb7f15620 100644
--- a/openedx/core/djangoapps/dark_lang/middleware.py
+++ b/openedx/core/djangoapps/dark_lang/middleware.py
@@ -16,7 +16,6 @@
 
 from openedx.core.djangoapps.dark_lang import DARK_LANGUAGE_KEY
 from openedx.core.djangoapps.dark_lang.models import DarkLangConfig
-from openedx.core.djangoapps.site_configuration.helpers import get_value
 from openedx.core.djangoapps.user_api.preferences.api import get_user_preference
 
 # If django 1.7 or higher is used, the right-side can be updated with new-style codes.
@@ -91,17 +90,8 @@ def process_request(self, request):
             return
 
         self._clean_accept_headers(request)
-        self._set_site_or_microsite_language(request)
         self._activate_preview_language(request)
 
-    def _set_site_or_microsite_language(self, request):
-        """
-        Apply language specified in site configuration.
-        """
-        language = get_value('LANGUAGE_CODE', None)
-        if language:
-            request.session[LANGUAGE_SESSION_KEY] = language
-
     def _fuzzy_match(self, lang_code):
         """Returns a fuzzy match for lang_code"""
         match = None
diff --git a/openedx/core/djangoapps/dark_lang/tests.py b/openedx/core/djangoapps/dark_lang/tests.py
index d5b6ceeae9be..76d61d2f494f 100644
--- a/openedx/core/djangoapps/dark_lang/tests.py
+++ b/openedx/core/djangoapps/dark_lang/tests.py
@@ -13,7 +13,6 @@
 
 from openedx.core.djangoapps.dark_lang.middleware import DarkLangMiddleware
 from openedx.core.djangoapps.dark_lang.models import DarkLangConfig
-from openedx.core.djangoapps.site_configuration.tests.test_util import with_site_configuration
 from openedx.core.djangolib.testing.utils import CacheIsolationTestCase
 from common.djangoapps.student.tests.factories import UserFactory
 
@@ -263,16 +262,6 @@ def _set_client_session_language(self, session_language):
         session[LANGUAGE_SESSION_KEY] = session_language
         session.save()
 
-    @with_site_configuration(configuration={'LANGUAGE_CODE': 'rel'})
-    def test_site_configuration_language(self):
-        # `LANGUAGE_CODE` in site configuration should override session lang
-        self._set_client_session_language('notrel')
-        self.client.get('/home')
-        self.assert_session_lang_equals(
-            'rel',
-            self.client.session
-        )
-
     def test_preview_lang_with_released_language(self):
         # Preview lang should always override selection
         self._post_set_preview_lang('rel')