Unexpected language code

asa · May 9, 2026, 5:23am

I ran a Google Pagespeed test on my instance and received the following message:

I can’t explain what’s causing it. Is there an error in the translator?

Moin · May 9, 2026, 3:05pm

I think the invalid code comes from Discourse.

app/views/common/_hreflang_tags.html.erb

0ae63cf57


      
          <% if SiteSetting.content_localization_enabled && SiteSetting.content_localization_crawler_param %>
            <% locales = SiteSetting.content_localization_supported_locales&.split('|') || [] %>
            <% if locales.any? %>
              <% current_path = request.path %>
              <% canonical_url = "#{Discourse.base_url}#{current_path}" %>
              <link rel="alternate" href="<%= canonical_url %>" hreflang="x-default" />
              <% locales.each do |locale| %>
                <link rel="alternate" href="<%= canonical_url %>?<%= Discourse::LOCALE_PARAM %>=<%= locale %>" hreflang="<%= locale %>" />
              <% end %>
            <% end %>
          <% end %>

Maybe instead of hreflang="<%= locale %>" it should be hreflang="<%= locale.tr('_', '-') %>" to replace the underscore.

asa · May 11, 2026, 12:43pm

I have submitted a Pull Request to fix this in the Discourse repository:

https://github.com/discourse/discourse/pull/39884

This change ensures the hreflang attribute is SEO-compliant while keeping the internal locale parameters functional.

nat · May 19, 2026, 1:19pm

Thank you for your PR, I’ve added specs and merged it.

nat · May 22, 2026, 1:19pm

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Unexpected language code

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