diff --git a/actionview/lib/action_view/helpers/tags/base.rb b/actionview/lib/action_view/helpers/tags/base.rb
index bbb8c4d224..922d4c5390 100644
--- a/actionview/lib/action_view/helpers/tags/base.rb
+++ b/actionview/lib/action_view/helpers/tags/base.rb
@@ -138,7 +138,7 @@ module ActionView
           end
 
           def sanitized_value(value)
-            value.to_s.gsub(/\s/, "_").gsub(/[^-\w]/, "").downcase
+            value.to_s.gsub(/\s/, "_").gsub(/[^-[[:word:]]]/, "").mb_chars.downcase.to_s
           end
 
           def select_content_tag(option_tags, options, html_options)
diff --git a/actionview/test/template/form_collections_helper_test.rb b/actionview/test/template/form_collections_helper_test.rb
index aa72621c7d..bba529a98a 100644
--- a/actionview/test/template/form_collections_helper_test.rb
+++ b/actionview/test/template/form_collections_helper_test.rb
@@ -39,6 +39,13 @@ class FormCollectionsHelperTest < ActionView::TestCase
     assert_select "label[for=user_active_no]", "No"
   end
 
+  test "collection radio generates labels for non-English values correctly" do
+    with_collection_radio_buttons :user, :title, ["Господин", "Госпожа"], :to_s, :to_s
+
+    assert_select "input[type=radio]#user_title_господин"
+    assert_select "label[for=user_title_господин]", "Господин"
+  end
+
   test "collection radio should sanitize collection values for labels correctly" do
     with_collection_radio_buttons :user, :name, ["$0.99", "$1.99"], :to_s, :to_s
     assert_select "label[for=user_name_099]", "$0.99"
@@ -299,6 +306,13 @@ class FormCollectionsHelperTest < ActionView::TestCase
     assert_select "label[for=user_name_199]", "$1.99"
   end
 
+  test "collection check boxes generates labels for non-English values correctly" do
+    with_collection_check_boxes :user, :title, ["Господин", "Госпожа"], :to_s, :to_s
+
+    assert_select "input[type=checkbox]#user_title_господин"
+    assert_select "label[for=user_title_господин]", "Господин"
+  end
+
   test "collection check boxes accepts html options as the last element of array" do
     collection = [[1, "Category 1", { class: "foo" }], [2, "Category 2", { class: "bar" }]]
     with_collection_check_boxes :user, :active, collection, :first, :second