diff --git a/odoo/addons/base/i18n/base.pot b/odoo/addons/base/i18n/base.pot
index 424adb8a8e7..41b75b2d060 100644
--- a/odoo/addons/base/i18n/base.pot
+++ b/odoo/addons/base/i18n/base.pot
@@ -31475,6 +31475,14 @@ msgstr ""
 
 #. module: base
 #. odoo-python
+#: code:addons/base/models/res_lang.py:0
+#, python-format
+msgid ""
+"You cannot archive the language in which Odoo was setup as it is used by "
+"automated processes."
+msgstr ""
+
+#. module: base
 #: code:addons/base/models/res_partner.py:0
 #, python-format
 msgid "You cannot create recursive Partner hierarchies."
diff --git a/odoo/addons/base/models/res_lang.py b/odoo/addons/base/models/res_lang.py
index ff8ae31778b..0ebfd61f430 100644
--- a/odoo/addons/base/models/res_lang.py
+++ b/odoo/addons/base/models/res_lang.py
@@ -292,10 +292,12 @@ class Lang(models.Model):
         if 'code' in vals and any(code != vals['code'] for code in lang_codes):
             raise UserError(_("Language code cannot be modified."))
         if vals.get('active') == False:
-            if self.env['res.users'].search_count([('lang', 'in', lang_codes)]):
+            if self.env['res.users'].with_context(active_test=True).search_count([('lang', 'in', lang_codes)], limit=1):
                 raise UserError(_("Cannot deactivate a language that is currently used by users."))
-            if self.env['res.partner'].search_count([('lang', 'in', lang_codes)]):
+            if self.env['res.partner'].with_context(active_test=True).search_count([('lang', 'in', lang_codes)], limit=1):
                 raise UserError(_("Cannot deactivate a language that is currently used by contacts."))
+            if self.env['res.users'].with_context(active_test=False).search_count([('lang', 'in', lang_codes)], limit=1):
+                raise UserError(_("You cannot archive the language in which Odoo was setup as it is used by automated processes."))
             # delete linked ir.default specifying default partner's language
             self.env['ir.default'].discard_values('res.partner', 'lang', lang_codes)
 
diff --git a/odoo/addons/base/tests/test_res_lang.py b/odoo/addons/base/tests/test_res_lang.py
index 3f6cf27b64e..bf42748e225 100644
--- a/odoo/addons/base/tests/test_res_lang.py
+++ b/odoo/addons/base/tests/test_res_lang.py
@@ -2,6 +2,7 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 from odoo.tests.common import TransactionCase
+from odoo.exceptions import UserError
 
 class test_res_lang(TransactionCase):
 
@@ -40,3 +41,21 @@ class test_res_lang(TransactionCase):
         assert intersperse("abc12", [3], '.') == ('abc12', 0)
         assert intersperse("abc12", [2], '.') == ('abc12', 0)
         assert intersperse("abc12", [1], '.') == ('abc1.2', 1)
+
+    def test_inactive_users_lang_deactivation(self):
+        # activate the language en_GB
+        language = self.env['res.lang']._activate_lang('en_GB')
+
+        # assign it to an inactive (new) user
+        user = self.env['res.users'].create({
+            'name': 'Foo',
+            'login': 'foo@example.com',
+            'lang': 'en_GB',
+            'active': False,
+        })
+
+        # make sure it is only used by that user
+        self.assertEqual(self.env['res.users'].with_context(active_test=False).search([('lang', '=', 'en_GB')]), user)
+
+        with self.assertRaises(UserError):
+            language.active = False