#428

backend/spec/requests/locale_resolution_spec.rb

@@ -0,0 +1,54 @@
+require 'rails_helper'
+
+RSpec.describe 'API locale resolution', type: :request do
+  let!(:tag) { create(:tag, primary_name: '日本語正本') }
+
+  it 'defaults an omitted locale to Japanese' do
+    get "/tags/#{ tag.id }"
+
+    expect(response).to have_http_status(:ok)
+    expect(json.fetch('name')).to eq('日本語正本')
+  end
+
+  it 'accepts an explicitly requested active Japanese locale' do
+    get "/tags/#{ tag.id }", params: { locale: 'ja' }
+
+    expect(response).to have_http_status(:ok)
+    expect(json.fetch('name')).to eq('日本語正本')
+  end
+
+  ['', 'en', 'ain', 'Jpan', 'JA', 'unknown', ['ja']].each do |code|
+    it "rejects invalid locale #{ code.inspect } instead of defaulting to Japanese" do
+      get "/tags/#{ tag.id }", params: { locale: code }
+
+      expect(response).to have_http_status(:not_found)
+      expect(response.body).not_to include('日本語正本')
+    end
+  end
+
+  it 'rejects a supported locale that has not been registered' do
+    get "/tags/#{ tag.id }", params: { locale: 'ain-Kana' }
+
+    expect(response).to have_http_status(:not_found)
+  end
+
+  it 'rejects an inactive locale' do
+    Locale.nipponese.update!(deprecated_at: Time.current)
+
+    get "/tags/#{ tag.id }", params: { locale: 'ja' }
+
+    expect(response).to have_http_status(:not_found)
+  end
+
+  it 'does not write posts or tag names under an invalid locale' do
+    sign_in_as(create_member_user!)
+
+    expect do
+      post '/posts', params: {
+          locale: 'en', title: 'invalid locale', url: 'https://example.com/invalid-locale',
+          tags: 'unwritten_tag' }
+    end.to change(Post, :count).by(0).and change(TagName, :count).by(0)
+
+    expect(response).to have_http_status(:not_found)
+  end
+end

backend/spec/requests/locale_write_paths_spec.rb

@@ -1,7 +1,7 @@
 require 'rails_helper'
 
 RSpec.describe 'Locale propagation on write paths', type: :request do
-  include_context 'English locale'
+  include_context 'Ainu locale'
 
   let(:member) { create(:user, :member) }
 
@@ -54,13 +54,12 @@ RSpec.describe 'Locale propagation on write paths', type: :request do
     end
   end
 
-  ['en', nil].each do |requested_locale|
+  ['ain-Kana', nil].each do |requested_locale|
     context "with locale #{ requested_locale.inspect }" do
       let(:locale_params) { requested_locale ? { locale: requested_locale } : { } }
       let(:expected_locale) { requested_locale ? locale : Locale.nipponese }
 
       it 'creates post tags in the requested language or Nipponese fallback' do
-        pending '日本語以外の Locale 有効化は別課題で実装する' if requested_locale
         locale if requested_locale
         post '/posts', params: locale_params.merge(
             title: 'Locale post', url: 'https://example.com/locale-post',
@@ -72,7 +71,6 @@ RSpec.describe 'Locale propagation on write paths', type: :request do
       end
 
       it 'updates post tags in the requested language or Nipponese fallback' do
-        pending '日本語以外の Locale 有効化は別課題で実装する' if requested_locale
         locale if requested_locale
         record = create(:post)
         PostVersionRecorder.record!(post: record, event_type: :create, created_by_user: member)
@@ -87,7 +85,6 @@ RSpec.describe 'Locale propagation on write paths', type: :request do
       end
 
       it 'passes the resolved locale to bulk creation' do
-        pending '日本語以外の Locale 有効化は別課題で実装する' if requested_locale
         locale if requested_locale
         # Worker propagation is exercised in post_bulk_creator_spec.
         expect_any_instance_of(PostBulkCreator).to receive(:run)
@@ -102,7 +99,6 @@ RSpec.describe 'Locale propagation on write paths', type: :request do
       end
 
       it 'creates materials with tags in the resolved locale' do
-        pending '日本語以外の Locale 有効化は別課題で実装する' if requested_locale
         locale if requested_locale
         post '/materials', params: locale_params.merge(
             tag: 'locale_material', url: 'https://example.com/material')
@@ -113,7 +109,6 @@ RSpec.describe 'Locale propagation on write paths', type: :request do
       end
 
       it 'updates materials with tags in the resolved locale' do
-        pending '日本語以外の Locale 有効化は別課題で実装する' if requested_locale
         locale if requested_locale
         tag = create(:tag, category: :material)
         material = Material.create!(tag:, url: 'https://example.com/material')
@@ -127,7 +122,6 @@ RSpec.describe 'Locale propagation on write paths', type: :request do
       end
 
       it 'links Nico external tags to internal tags in the resolved locale' do
-        pending '日本語以外の Locale 有効化は別課題で実装する' if requested_locale
         locale if requested_locale
         external = create(:external_tag)
         NicoTagVersionRecorder.record!(
@@ -141,7 +135,6 @@ RSpec.describe 'Locale propagation on write paths', type: :request do
       end
 
       it 'creates parent tags in the resolved locale' do
-        pending '日本語以外の Locale 有効化は別課題で実装する' if requested_locale
         locale if requested_locale
         tag = create(:tag)
 
@@ -157,10 +150,10 @@ RSpec.describe 'Locale propagation on write paths', type: :request do
   end
 
   context 'with existing names in both languages' do
-    let(:english_name) do
-      create(:tag_name, name: 'shared_name', language_code: 'en', script_code: 'Latn')
+    let(:ainu_name) do
+      create(:tag_name, name: 'shared_name', language_code: 'ain', script_code: 'Kana')
     end
-    let(:english_tag) { create(:tag, primary_tag_name: english_name, category: :material) }
+    let(:ainu_tag) { create(:tag, primary_tag_name: ainu_name, category: :material) }
     let(:nipponese_tag) do
       create(:tag, primary_name: 'temporary_nipponese', category: :general).tap do |tag|
         # Isolate lookup from the separately tested uniqueness validation.
@@ -168,173 +161,163 @@ RSpec.describe 'Locale propagation on write paths', type: :request do
       end
     end
 
-    it 'plans and creates the post using the English identity and category' do
-      pending '日本語以外の Locale 有効化は別課題で実装する'
+    it 'plans and creates the post using the Ainu identity and category' do
       locale
-      english_tag
+      ainu_tag
       nipponese_tag
       post '/posts', params: {
-          locale: 'en', title: 'English identity',
-          url: 'https://example.com/english-identity', tags: 'shared_name', parent_post_ids: '' }
+          locale: 'ain-Kana', title: 'Ainu identity',
+          url: 'https://example.com/ainu-identity', tags: 'shared_name', parent_post_ids: '' }
 
       expect(response).to have_http_status(:created), response.body
       record = Post.find(json.fetch('id'))
-      expect(record.tags).to include(english_tag)
+      expect(record.tags).to include(ainu_tag)
       expect(record.tags).not_to include(nipponese_tag)
-      expect(english_tag.reload.category).to eq('material')
+      expect(ainu_tag.reload.category).to eq('material')
       expect(nipponese_tag.reload.category).to eq('general')
     end
 
-    it 'updates the post using the English identity' do
-      pending '日本語以外の Locale 有効化は別課題で実装する'
+    it 'updates the post using the Ainu identity' do
       locale
-      english_tag
+      ainu_tag
       nipponese_tag
       record = create(:post)
       PostVersionRecorder.record!(post: record, event_type: :create, created_by_user: member)
 
       put "/posts/#{ record.id }", params: {
-          locale: 'en', title: record.title, tags: 'shared_name', parent_post_ids: '',
+          locale: 'ain-Kana', title: record.title, tags: 'shared_name', parent_post_ids: '',
           base_version_no: record.reload.version_no }
 
       expect(response).to have_http_status(:ok), response.body
-      expect(record.reload.tags).to include(english_tag)
+      expect(record.reload.tags).to include(ainu_tag)
       expect(record.tags).not_to include(nipponese_tag)
     end
 
-    it 'resolves the English material tag' do
-      pending '日本語以外の Locale 有効化は別課題で実装する'
+    it 'resolves the Ainu material tag' do
       locale
-      english_tag
+      ainu_tag
       nipponese_tag
       post '/materials', params: {
-          locale: 'en', tag: 'shared_name', url: 'https://example.com/english-material' }
+          locale: 'ain-Kana', tag: 'shared_name', url: 'https://example.com/ainu-material' }
 
       expect(response).to have_http_status(:created), response.body
-      expect(Material.find(json.fetch('id')).tag).to eq(english_tag)
+      expect(Material.find(json.fetch('id')).tag).to eq(ainu_tag)
       expect(Material.where(tag: nipponese_tag)).to be_empty
     end
 
-    it 'resolves the English parent tag' do
-      pending '日本語以外の Locale 有効化は別課題で実装する'
+    it 'resolves the Ainu parent tag' do
       locale
-      english_tag
+      ainu_tag
       nipponese_tag
       child = create(:tag)
 
       put "/tags/#{ child.id }", params: {
-          locale: 'en', name: primary_tag_name_for(child, 'ja').name,
+          locale: 'ain-Kana', name: primary_tag_name_for(child, 'ja').name,
           category: child.category, deprecated: false,
           aliases: '', parent_tags: 'shared_name' }
 
       expect(response).to have_http_status(:ok), response.body
-      expect(TagImplication.where(tag: child).pluck(:parent_tag_id)).to eq([english_tag.id])
+      expect(TagImplication.where(tag: child).pluck(:parent_tag_id)).to eq([ainu_tag.id])
     end
 
-    it 'resolves the English internal tag for a Nico link' do
-      pending '日本語以外の Locale 有効化は別課題で実装する'
+    it 'resolves the Ainu internal tag for a Nico link' do
       locale
-      english_tag
+      ainu_tag
       nipponese_tag
       external = create(:external_tag)
       NicoTagVersionRecorder.record!(
           external_tag: external, event_type: :create, created_by_user: member)
 
-      put "/tags/nico/#{ external.id }", params: { locale: 'en', tags: 'shared_name' }
+      put "/tags/nico/#{ external.id }", params: { locale: 'ain-Kana', tags: 'shared_name' }
 
       expect(response).to have_http_status(:ok), response.body
-      expect(external.reload.linked_tags).to contain_exactly(english_tag)
+      expect(external.reload.linked_tags).to contain_exactly(ainu_tag)
     end
   end
 
-  context 'when renaming or updating aliases in English' do
-    let(:english_name) do
-      create(:tag_name, name: 'english_original', language_code: 'en', script_code: 'Latn')
+  context 'when renaming or updating aliases in Ainu' do
+    let(:ainu_name) do
+      create(:tag_name, name: 'ainu_original', language_code: 'ain', script_code: 'Kana')
     end
-    let(:tag) { create(:tag, primary_tag_name: english_name) }
+    let(:tag) { create(:tag, primary_tag_name: ainu_name) }
 
     it 'marks a human-renamed generated primary as no longer auto-generated' do
-      pending '日本語以外の Locale 有効化は別課題で実装する'
       locale
       generated_tag = create(:tag, primary_name: 'rename_generated_source')
-      generated_name = primary_tag_name_for(generated_tag, 'en')
+      generated_name = primary_tag_name_for(generated_tag, 'ain')
       expect(generated_name.auto_generated).to be(true)
 
       patch "/tags/#{ generated_tag.id }", params: {
-          locale: 'en', name: 'human_english_name' }
+          locale: 'ain-Kana', name: 'human_ainu_name' }
 
       expect(response).to have_http_status(:ok), response.body
       expect(generated_name.reload).to have_attributes(
-          name: 'human_english_name', auto_generated: false)
+          name: 'human_ainu_name', auto_generated: false)
     end
 
     it 'does not steal another tag primary for an alias' do
-      pending '日本語以外の Locale 有効化は別課題で実装する'
       locale
       other_tag = create(:tag, primary_name: 'other_nipponese')
-      other_primary = primary_tag_name_for(other_tag, 'en')
-      other_primary.update!(name: 'other_english_primary', auto_generated: false)
-      create(:tag_name, :alias, tag:, name: 'existing_english_alias',
-                                language_code: 'en', script_code: 'Latn')
-      primary_name_before = primary_tag_name_for(tag, 'en').name
+      other_primary = primary_tag_name_for(other_tag, 'ain')
+      other_primary.update!(name: 'other_ainu_primary', auto_generated: false)
+      create(:tag_name, :alias, tag:, name: 'existing_ainu_alias',
+                                language_code: 'ain', script_code: 'Kana')
+      primary_name_before = primary_tag_name_for(tag, 'ain').name
       aliases_before =
-          tag.tag_names.where(language_code: 'en', primary_flg: false)
+          tag.tag_names.where(language_code: 'ain', primary_flg: false)
               .order(:name).pluck(:name)
       category_before = tag.category
 
       put "/tags/#{ tag.id }", params: {
-          locale: 'en', name: 'renamed_before_alias_collision',
+          locale: 'ain-Kana', name: 'renamed_before_alias_collision',
           category: 'character', deprecated: false,
-          aliases: 'other_english_primary', parent_tags: '' }
+          aliases: 'other_ainu_primary', parent_tags: '' }
 
       aggregate_failures do
         expect(response).to have_http_status(:unprocessable_entity)
         expect(other_primary.reload).to have_attributes(
-            tag_id: other_tag.id, language_code: 'en', primary_flg: true)
-        expect(TagName.where(tag: other_tag, language_code: 'en', primary_flg: true))
+            tag_id: other_tag.id, language_code: 'ain', primary_flg: true)
+        expect(TagName.where(tag: other_tag, language_code: 'ain', primary_flg: true))
             .to contain_exactly(other_primary)
-        expect(primary_tag_name_for(tag.reload, 'en').name).to eq(primary_name_before)
+        expect(primary_tag_name_for(tag.reload, 'ain').name).to eq(primary_name_before)
         expect(tag.category).to eq(category_before)
         aliases_after =
-            tag.tag_names.where(language_code: 'en', primary_flg: false)
+            tag.tag_names.where(language_code: 'ain', primary_flg: false)
                 .order(:name).pluck(:name)
         expect(aliases_after).to eq(aliases_before)
       end
     end
 
     it 'allows a rename to a name already used in Nipponese' do
-      pending '日本語以外の Locale 有効化は別課題で実装する'
       locale
       nipponese = create(:tag, primary_name: 'rename_target')
 
-      patch "/tags/#{ tag.id }", params: { locale: 'en', name: 'rename_target' }
+      patch "/tags/#{ tag.id }", params: { locale: 'ain-Kana', name: 'rename_target' }
 
       expect(response).to have_http_status(:ok), response.body
-      expect(primary_tag_name_for(tag.reload, 'en')).to have_attributes(
-          name: 'rename_target', language_code: 'en', tag_id: tag.id)
+      expect(primary_tag_name_for(tag.reload, 'ain')).to have_attributes(
+          name: 'rename_target', language_code: 'ain', tag_id: tag.id)
       expect(primary_tag_name_for(nipponese.reload, 'ja')).to have_attributes(
           name: 'rename_target', language_code: 'ja', tag_id: nipponese.id)
     end
 
     it 'creates aliases in the requested language' do
-      pending '日本語以外の Locale 有効化は別課題で実装する'
       locale
       put "/tags/#{ tag.id }", params: {
-          locale: 'en', name: english_name.name,
+          locale: 'ain-Kana', name: ainu_name.name,
           category: tag.category, deprecated: false,
-          aliases: 'english_alias', parent_tags: '' }
+          aliases: 'ainu_alias', parent_tags: '' }
 
       expect(response).to have_http_status(:ok), response.body
-      expect(TagName.find_by!(language_code: 'en', name: 'english_alias'))
+      expect(TagName.find_by!(language_code: 'ain', name: 'ainu_alias'))
           .to have_attributes(
-              script_code: 'Latn',
-              tag_id: tag.id, primary_flg: false, language_code: 'en')
-      primary = TagName.find_by!(tag_id: tag.id, language_code: 'en', primary_flg: true)
-      expect(primary).to have_attributes(name: 'english_original', script_code: 'Latn')
+              script_code: 'Kana',
+              tag_id: tag.id, primary_flg: false, language_code: 'ain')
+      primary = TagName.find_by!(tag_id: tag.id, language_code: 'ain', primary_flg: true)
+      expect(primary).to have_attributes(name: 'ainu_original', script_code: 'Kana')
     end
 
     it 'does not take an alias from another language' do
-      pending '日本語以外の Locale 有効化は別課題で実装する'
       locale
       nipponese = create(:tag, primary_name: 'nipponese_owner')
       nipponese_alias = create(:tag_name, :alias, name: 'shared_alias',
@@ -344,7 +327,7 @@ RSpec.describe 'Locale propagation on write paths', type: :request do
           primary_flg: false, language_code: 'ja')
 
       put "/tags/#{ tag.id }", params: {
-          locale: 'en', name: english_name.name,
+          locale: 'ain-Kana', name: ainu_name.name,
           category: tag.category, deprecated: false,
           aliases: 'shared_alias', parent_tags: '' }
 
@@ -352,12 +335,12 @@ RSpec.describe 'Locale propagation on write paths', type: :request do
       expect(nipponese_alias.reload).to have_attributes(
           tag_id: nipponese.id,
           primary_flg: false, language_code: 'ja')
-      expect(TagName.find_by!(language_code: 'en', name: 'shared_alias'))
+      expect(TagName.find_by!(language_code: 'ain', name: 'shared_alias'))
           .to have_attributes(
-              tag_id: tag.id, script_code: 'Latn',
-              primary_flg: false, language_code: 'en')
+              tag_id: tag.id, script_code: 'Kana',
+              primary_flg: false, language_code: 'ain')
       expect(TagName.where(name: 'shared_alias').pluck(:language_code, :tag_id))
-          .to contain_exactly(['ja', nipponese.id], ['en', tag.id])
+          .to contain_exactly(['ja', nipponese.id], ['ain', tag.id])
     end
   end
 end

backend/spec/requests/tag_group_locale_spec.rb

@@ -22,7 +22,7 @@ RSpec.describe 'Tag group locale contracts', type: :request do
 
   it 'uses selected-language names in native collection and nested placements' do
     ["/tag_groups/#{ group.id }", '/tag_groups'].each do |path|
-      get path, params: { locale: 'ain' }
+      get path, params: { locale: 'ain-Kana' }
       expect(response).to have_http_status(:ok)
       representation = json.is_a?(Array) ? json.sole : json
       expect(representation.fetch('members').sole.fetch('tag').fetch('name'))
@@ -37,14 +37,14 @@ RSpec.describe 'Tag group locale contracts', type: :request do
   it 'uses snapshot names recursively for history and current names for the latest view' do
     version = group.versions.sole
     ainu_name.update!(name: 'renamed_ainu')
-    get "/wiki/#{ group.id }", params: { locale: 'ain' }
+    get "/wiki/#{ group.id }", params: { locale: 'ain-Kana' }
     expect(response).to have_http_status(:ok)
     expect(json.fetch('body')).to include('renamed_ainu')
-    get "/wiki/#{ group.id }", params: { locale: 'ain', version: version.id }
+    get "/wiki/#{ group.id }", params: { locale: 'ain-Kana', version: version.id }
     expect(response).to have_http_status(:ok)
     expect(json.fetch('body').scan('ainu_member').length).to eq(2)
     expect(json.fetch('body')).not_to include('renamed_ainu', 'japanese_member')
-    get "/wiki/#{ group.id }/diff", params: { locale: 'ain', from: version.id }
+    get "/wiki/#{ group.id }/diff", params: { locale: 'ain-Kana', from: version.id }
     expect(response).to have_http_status(:ok)
     expect(json.fetch('diff').map { _1.fetch('type') }.uniq).to eq(['context'])
   end
@@ -52,23 +52,24 @@ RSpec.describe 'Tag group locale contracts', type: :request do
   ['タググループ:', 'tag_group:', 'TAG_GROUP:'].each do |prefix|
     it "round trips #{ prefix } through create, lookup, search and update" do
       post '/wiki', params: {
-          locale: 'ain', title: "#{ prefix }parent", body: '- tag_group:locale group' },
+          locale: 'ain-Kana', title: "#{ prefix }parent", body: '- tag_group:locale group' },
           headers: headers
       expect(response).to have_http_status(:created)
       id = json.fetch('id')
       expect(json.fetch('body')).to include('タググループ:locale group')
       path = "/wiki/title/#{ CGI.escapeURIComponent("#{ prefix }parent") }"
-      get path, params: { locale: 'ain' }
+      get path, params: { locale: 'ain-Kana' }
       expect(response).to have_http_status(:ok)
       expect(json.fetch('id')).to eq(id)
-      get "#{ path }/exists", params: { locale: 'ain' }
+      get "#{ path }/exists", params: { locale: 'ain-Kana' }
       expect(response).to have_http_status(:no_content)
-      get '/wiki/search', params: { locale: 'ain', title: "#{ prefix }parent" }
+      get '/wiki/search', params: { locale: 'ain-Kana', title: "#{ prefix }parent" }
       expect(json.map { _1.fetch('id') }).to eq([id])
       put "/wiki/#{ id }", params: {
-          locale: 'ain', title: "#{ prefix }renamed", body: '- ainu_member' }, headers: headers
+          locale: 'ain-Kana', title: "#{ prefix }renamed", body: '- ainu_member' },
+          headers: headers
       expect(response).to have_http_status(:ok)
-      get "/tag_groups/#{ id }", params: { locale: 'ain' }
+      get "/tag_groups/#{ id }", params: { locale: 'ain-Kana' }
       expect(json.fetch('members').sole.fetch('tag').fetch('name')).to eq('ainu_member')
     end
   end
@@ -81,7 +82,7 @@ RSpec.describe 'Tag group locale contracts', type: :request do
     end.to raise_error(TagGroupMarkdownParser::InvalidDocument)
     before_state = group_state
     put "/wiki/#{ group.id }", params: {
-        locale: 'ain', title: 'タググループ:partial rename', body: '- japanese_member' },
+        locale: 'ain-Kana', title: 'タググループ:partial rename', body: '- japanese_member' },
         headers: headers
     expect(response).to have_http_status(:unprocessable_entity)
     expect(group_state).to eq(before_state)
@@ -89,15 +90,15 @@ RSpec.describe 'Tag group locale contracts', type: :request do
 
   it 'passes locale into native validation and facade compatibility checks' do
     post '/tag_groups', params: {
-        locale: 'ain', name: 'native', description: nil, members:, placements: },
+        locale: 'ain-Kana', name: 'native', description: nil, members:, placements: },
         headers:, as: :json
     expect(response).to have_http_status(:created)
     id = json.fetch('id')
     expect(json.fetch('members').sole.fetch('tag').fetch('name')).to eq('ainu_member')
-    get "/wiki/#{ id }", params: { locale: 'ain' }
+    get "/wiki/#{ id }", params: { locale: 'ain-Kana' }
     expect(response).to have_http_status(:ok)
     body = json.fetch('body')
-    put "/wiki/#{ id }", params: { locale: 'ain', title: 'tag_group:native', body: },
+    put "/wiki/#{ id }", params: { locale: 'ain-Kana', title: 'tag_group:native', body: },
         headers: headers
     expect(response).to have_http_status(:ok)
     expect(TagGroup.find(id).version_no).to eq(1)
@@ -115,7 +116,7 @@ RSpec.describe 'Tag group locale contracts', type: :request do
     representation = TagGroupRepr.historical(ainu_locale, version)
     expect(representation.fetch('members').sole.fetch('tag').fetch('name')).to be_nil
     expect(representation.fetch('placements').sole.fetch('tag').fetch('name')).to be_nil
-    get "/wiki/#{ old_group.id }", params: { locale: 'ain', version: version.id }
+    get "/wiki/#{ old_group.id }", params: { locale: 'ain-Kana', version: version.id }
     expect(response).to have_http_status(:unprocessable_entity)
     expect(response.body).not_to include('historical_japanese', 'current_ainu')
   end

backend/spec/requests/wiki_locale_spec.rb

@@ -20,12 +20,12 @@ RSpec.describe 'Wiki and native API locale contracts', type: :request do
 
   ['/wiki', '/wiki/search'].each do |path|
     it "filters #{ path } by the selected language" do
-      get path, params: { locale: 'ain' }
+      get path, params: { locale: 'ain-Kana' }
       expect(response).to have_http_status(:ok)
       expect(json.map { _1.fetch('id') }).to eq([ainu.id])
       expect(json.sole).to include('title' => 'ainu_title', 'body' => 'Ainu body')
 
-      get path, params: { locale: 'ain', title: 'japanese' }
+      get path, params: { locale: 'ain-Kana', title: 'japanese' }
       expect(response).to have_http_status(:ok)
       expect(json).to eq([])
     end
@@ -39,17 +39,17 @@ RSpec.describe 'Wiki and native API locale contracts', type: :request do
 
   it 'resolves titles and aliases only in the selected language in both APIs' do
     ['/wiki/title/japanese_title', '/tags/name/japanese_title/description'].each do |path|
-      get path, params: { locale: 'ain' }
+      get path, params: { locale: 'ain-Kana' }
       expect(response).to have_http_status(:not_found)
     end
     ['/wiki/title/ainu_title', '/tags/name/ainu_title/description'].each do |path|
-      get path, params: { locale: 'ain' }
+      get path, params: { locale: 'ain-Kana' }
       expect(response).to have_http_status(:ok)
       expect(json.fetch('body')).to eq('Ainu body')
     end
-    get '/wiki/title/ainu_title/exists', params: { locale: 'ain' }
+    get '/wiki/title/ainu_title/exists', params: { locale: 'ain-Kana' }
     expect(response).to have_http_status(:no_content)
-    get '/wiki/title/japanese_title/exists', params: { locale: 'ain' }
+    get '/wiki/title/japanese_title/exists', params: { locale: 'ain-Kana' }
     expect(response).to have_http_status(:not_found)
   end
 
@@ -57,14 +57,14 @@ RSpec.describe 'Wiki and native API locale contracts', type: :request do
     revision = current_description_version(japanese)
     ["/wiki/#{ japanese.id }", "/wiki/#{ japanese.id }/exists",
      "/wiki/#{ japanese.id }/diff"].each do |path|
-      get path, params: { locale: 'ain', from: revision.id }
+      get path, params: { locale: 'ain-Kana', from: revision.id }
       expect(response).to have_http_status(:not_found)
       expect(response.body).not_to include('Japanese body')
     end
-    get '/wiki/changes', params: { locale: 'ain', id: japanese.id }
+    get '/wiki/changes', params: { locale: 'ain-Kana', id: japanese.id }
     expect(response).to have_http_status(:ok)
     expect(json).to eq([])
-    get '/wiki/changes', params: { locale: 'ain' }
+    get '/wiki/changes', params: { locale: 'ain-Kana' }
     expect(json.map { _1.fetch('revision_id') })
         .to eq([current_description_version(ainu).id])
   end
@@ -73,7 +73,7 @@ RSpec.describe 'Wiki and native API locale contracts', type: :request do
     snapshot = [japanese.attributes, ainu.attributes, ainu_name.attributes]
     expect do
       put "/wiki/#{ japanese.id }", params: {
-          locale: 'ain', title: 'renamed', body: 'wrong target' }, headers: headers
+          locale: 'ain-Kana', title: 'renamed', body: 'wrong target' }, headers: headers
     end.not_to change(TagDescriptionVersion, :count)
     expect(response).to have_http_status(:not_found)
     expect([japanese.reload.attributes, ainu.reload.attributes, ainu_name.reload.attributes])
@@ -89,10 +89,10 @@ RSpec.describe 'Wiki and native API locale contracts', type: :request do
       snapshot = original.attributes
       expect do
         if api == :wiki
-          post '/wiki', params: { locale: 'ain', title: 'other_ainu', body: 'created' },
+          post '/wiki', params: { locale: 'ain-Kana', title: 'other_ainu', body: 'created' },
                headers: headers
         else
-          put "/tags/#{ other.id }/description", params: { locale: 'ain', body: 'created' },
+          put "/tags/#{ other.id }/description", params: { locale: 'ain-Kana', body: 'created' },
               headers: headers
         end
       end.to change(TagDescription, :count).by(1)
@@ -108,20 +108,20 @@ RSpec.describe 'Wiki and native API locale contracts', type: :request do
   it 'shares selected-language edits and revision identity across both APIs' do
     snapshot = japanese.attributes
     first = current_description_version(ainu)
-    put "/tags/#{ tag.id }/description", params: { locale: 'ain', body: 'native edit' },
+    put "/tags/#{ tag.id }/description", params: { locale: 'ain-Kana', body: 'native edit' },
         headers: headers
     expect(response).to have_http_status(:ok)
     second = current_description_version(ainu)
     expect(second).to have_attributes(language_code: 'ain', version_no: 2)
     expect(second.id).not_to eq(first.id)
-    get "/wiki/#{ ainu.id }", params: { locale: 'ain' }
+    get "/wiki/#{ ainu.id }", params: { locale: 'ain-Kana' }
     expect(json).to include('body' => 'native edit', 'revision_id' => second.id)
 
     put "/wiki/#{ ainu.id }", params: {
-        locale: 'ain', title: 'ainu_title', body: 'facade edit',
+        locale: 'ain-Kana', title: 'ainu_title', body: 'facade edit',
         base_revision_id: second.id }, headers: headers
     expect(response).to have_http_status(:ok)
-    get "/tags/#{ tag.id }/description", params: { locale: 'ain' }
+    get "/tags/#{ tag.id }/description", params: { locale: 'ain-Kana' }
     expect(json).to include('body' => 'facade edit', 'language_code' => 'ain', 'version_no' => 3)
     expect(japanese.reload.attributes).to eq(snapshot)
   end
@@ -133,7 +133,7 @@ RSpec.describe 'Wiki and native API locale contracts', type: :request do
     snapshot = [ainu.reload.attributes, ainu_name.attributes, japanese.attributes]
     expect do
       put "/wiki/#{ ainu.id }", params: {
-          locale: 'ain', title: 'conflicting_name', body: 'current',
+          locale: 'ain-Kana', title: 'conflicting_name', body: 'current',
           base_revision_id: stale.id }, headers: headers
     end.to change(TagDescriptionVersion, :count).by(0).and change(TagVersion, :count).by(0)
     expect(response).to have_http_status(:conflict)
@@ -145,14 +145,14 @@ RSpec.describe 'Wiki and native API locale contracts', type: :request do
     first = current_description_version(ainu)
     TagDescriptionOperation.update!(
         ainu_locale, tag:, body: 'later', updated_by_user: user)
-    get "/wiki/#{ ainu.id }", params: { locale: 'ain', version: first.id }
+    get "/wiki/#{ ainu.id }", params: { locale: 'ain-Kana', version: first.id }
     expect(response).to have_http_status(:ok)
     expect(json).to include('body' => 'Ainu body', 'revision_id' => first.id)
-    get "/wiki/#{ ainu.id }/diff", params: { locale: 'ain', from: first.id }
+    get "/wiki/#{ ainu.id }/diff", params: { locale: 'ain-Kana', from: first.id }
     expect(response).to have_http_status(:ok)
     expect(json.fetch('newer_revision_id')).to eq(current_description_version(ainu).id)
     get "/wiki/#{ ainu.id }/diff", params: {
-        locale: 'ain', from: current_description_version(japanese).id }
+        locale: 'ain-Kana', from: current_description_version(japanese).id }
     expect(response).to have_http_status(:not_found)
   end
 end