Apply lang attribute to localized name:* values

app/helpers/browse_helper.rb

@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 module BrowseHelper
+  include BrowseTagsHelper
+
   def element_icon(type, object)
     selected_icon_data = { :filename => "#{type}.svg", :priority => 1 }
 
@@ -72,6 +74,18 @@ def link_follow(object)
     "nofollow" if object.tags.empty?
   end
 
+  def browse_tag_value_cell(tag)
+    content_tag :td,
+                format_value(tag[0], tag[1]),
+                :class => "py-1 border-secondary-subtle border-start",
+                :dir => "auto",
+                :lang => tag_language(tag[0])
+  end
+
+  def tag_language(key)
+    key[/\Aname:([a-z]{2,3}(?:-[A-Za-z0-9]+)*)\z/, 1]
+  end
+
   private
 
   def feature_name(tags)

app/views/browse/_tag.html.erb

@@ -1,4 +1,7 @@
 <tr>
-  <th class="py-1 border-secondary-subtle table-secondary fw-normal" dir="auto"><%= format_key(tag[0]) %></th>
-  <td class="py-1 border-secondary-subtle border-start" dir="auto"><%= format_value(tag[0], tag[1]) %></td>
+  <th class="py-1 border-secondary-subtle table-secondary fw-normal" dir="auto">
+    <%= format_key(tag[0]) %>
+  </th>
+
+  <%= browse_tag_value_cell(tag) %>
 </tr>

test/controllers/api/changesets/uploads_controller_test.rb

@@ -216,9 +216,14 @@ def test_upload_race_condition
 
         threads = Array.new(concurrency_level) do
           Thread.new do
-            post path, :params => diff, :headers => auth_header
+            ActiveRecord::Base.connection_pool.with_connection do
+              open_session do |sess|
+                sess.post path, :params => diff, :headers => auth_header
+              end
+            end
           end
         end
+
         threads.each(&:join)
 
         changeset.reload

test/helpers/browse_helper_test.rb

@@ -109,6 +109,22 @@ def test_element_icon
     end
   end
 
+  def test_lang_attribute_for_localized_name_tags
+    tag = ["name:pt", "Nó teste"]
+
+    html = browse_tag_value_cell(tag)
+
+    assert_match(/lang="pt"/, html)
+  end
+
+  def test_non_language_name_tags_do_not_get_lang_attribute
+    tag = ["name:etymology", "Origin"]
+
+    html = browse_tag_value_cell(tag)
+
+    assert_no_match(/lang="/, html)
+  end
+
   private
 
   def add_old_tags_selection(old_node)