Fix handling of `inLanguage` attribute in preview card processing (#27423)

app/lib/link_details_extractor.rb

@@ -36,7 +36,8 @@ class LinkDetailsExtractor
     end
 
     def language
-      json['inLanguage']
+      lang = json['inLanguage']
+      lang.is_a?(Hash) ? (lang['alternateName'] || lang['name']) : lang
     end
 
     def type

spec/lib/link_details_extractor_spec.rb

@@ -82,6 +82,10 @@ RSpec.describe LinkDetailsExtractor do
           'name' => 'Pet News',
           'url' => 'https://example.com',
         },
+        'inLanguage' => {
+          name: 'English',
+          alternateName: 'en',
+        },
       }.to_json
     end
 
@@ -115,6 +119,12 @@ RSpec.describe LinkDetailsExtractor do
           expect(subject.provider_name).to eq 'Pet News'
         end
       end
+
+      describe '#language' do
+        it 'returns the language from structured data' do
+          expect(subject.language).to eq 'en'
+        end
+      end
     end
 
     context 'when is wrapped in CDATA tags' do