14 files changed, 59 insertions, 10 deletions

diff --git a/lib/api/api.rb b/lib/api/api.rb
index 1bf20f76ad6..302ccd3e532 100644
--- a/lib/api/api.rb
+++ b/lib/api/api.rb
@@ -44,6 +44,9 @@ module API
     end
 
     before { allow_access_with_scope :api }
+    before { Gitlab::I18n.set_locale(current_user) }
+
+    after { Gitlab::I18n.reset_locale }
 
     rescue_from Gitlab::Access::AccessDeniedError do
       rack_response({ 'message' => '403 Forbidden' }.to_json, 403)
diff --git a/lib/gitlab/cycle_analytics/base_stage.rb b/lib/gitlab/cycle_analytics/base_stage.rb
index 559e3939da6..cac31ea8cff 100644
--- a/lib/gitlab/cycle_analytics/base_stage.rb
+++ b/lib/gitlab/cycle_analytics/base_stage.rb
@@ -17,7 +17,7 @@ module Gitlab
       end
 
       def title
-        name.to_s.capitalize
+        raise NotImplementedError.new("Expected #{self.name} to implement title")
       end
 
       def median
diff --git a/lib/gitlab/cycle_analytics/code_stage.rb b/lib/gitlab/cycle_analytics/code_stage.rb
index 182d4c43fbd..5f9dc9a4303 100644
--- a/lib/gitlab/cycle_analytics/code_stage.rb
+++ b/lib/gitlab/cycle_analytics/code_stage.rb
@@ -13,12 +13,16 @@ module Gitlab
         :code
       end
 
+      def title
+        s_('CycleAnalyticsStage|Code')
+      end
+
       def legend
         _("Related Merge Requests")
       end
 
       def description
-        "Time until first merge request"
+        _("Time until first merge request")
       end
     end
   end
diff --git a/lib/gitlab/cycle_analytics/issue_stage.rb b/lib/gitlab/cycle_analytics/issue_stage.rb
index 08e249116a4..7b03811efb2 100644
--- a/lib/gitlab/cycle_analytics/issue_stage.rb
+++ b/lib/gitlab/cycle_analytics/issue_stage.rb
@@ -14,12 +14,16 @@ module Gitlab
         :issue
       end
 
+      def title
+        s_('CycleAnalyticsStage|Issue')
+      end
+
       def legend
         _("Related Issues")
       end
 
       def description
-        "Time before an issue gets scheduled"
+        _("Time before an issue gets scheduled")
       end
     end
   end
diff --git a/lib/gitlab/cycle_analytics/plan_stage.rb b/lib/gitlab/cycle_analytics/plan_stage.rb
index c5b2809209c..1a0afb56b4f 100644
--- a/lib/gitlab/cycle_analytics/plan_stage.rb
+++ b/lib/gitlab/cycle_analytics/plan_stage.rb
@@ -14,12 +14,16 @@ module Gitlab
         :plan
       end
 
+      def title
+        s_('CycleAnalyticsStage|Plan')
+      end
+
       def legend
         _("Related Commits")
       end
 
       def description
-        "Time before an issue starts implementation"
+        _("Time before an issue starts implementation")
       end
     end
   end
diff --git a/lib/gitlab/cycle_analytics/production_stage.rb b/lib/gitlab/cycle_analytics/production_stage.rb
index 8f05c840db1..0fa8a65cb99 100644
--- a/lib/gitlab/cycle_analytics/production_stage.rb
+++ b/lib/gitlab/cycle_analytics/production_stage.rb
@@ -15,12 +15,16 @@ module Gitlab
         :production
       end
 
+      def title
+        s_('CycleAnalyticsStage|Production')
+      end
+
       def legend
         _("Related Issues")
       end
 
       def description
-        "From issue creation until deploy to production"
+        _("From issue creation until deploy to production")
       end
 
       def query
diff --git a/lib/gitlab/cycle_analytics/review_stage.rb b/lib/gitlab/cycle_analytics/review_stage.rb
index 4f4c94f4020..2cab363ba9d 100644
--- a/lib/gitlab/cycle_analytics/review_stage.rb
+++ b/lib/gitlab/cycle_analytics/review_stage.rb
@@ -13,12 +13,16 @@ module Gitlab
         :review
       end
 
+      def title
+        s_('CycleAnalyticsStage|Review')
+      end
+
       def legend
         _("Relative Merged Requests")
       end
 
       def description
-        "Time between merge request creation and merge/close"
+        _("Time between merge request creation and merge/close")
       end
     end
   end
diff --git a/lib/gitlab/cycle_analytics/staging_stage.rb b/lib/gitlab/cycle_analytics/staging_stage.rb
index da8eb8c55de..c1753340842 100644
--- a/lib/gitlab/cycle_analytics/staging_stage.rb
+++ b/lib/gitlab/cycle_analytics/staging_stage.rb
@@ -14,12 +14,16 @@ module Gitlab
         :staging
       end
 
+      def title
+        s_('CycleAnalyticsStage|Staging')
+      end
+
       def legend
         _("Relative Deployed Builds")
       end
 
       def description
-        "From merge request merge until deploy to production"
+        _("From merge request merge until deploy to production")
       end
     end
   end
diff --git a/lib/gitlab/cycle_analytics/summary/base.rb b/lib/gitlab/cycle_analytics/summary/base.rb
index 43fa3795e5c..a917ddccac7 100644
--- a/lib/gitlab/cycle_analytics/summary/base.rb
+++ b/lib/gitlab/cycle_analytics/summary/base.rb
@@ -8,7 +8,7 @@ module Gitlab
         end
 
         def title
-          self.class.name.demodulize
+          raise NotImplementedError.new("Expected #{self.name} to implement title")
         end
 
         def value
diff --git a/lib/gitlab/cycle_analytics/summary/commit.rb b/lib/gitlab/cycle_analytics/summary/commit.rb
index 7b8faa4d854..bea78862757 100644
--- a/lib/gitlab/cycle_analytics/summary/commit.rb
+++ b/lib/gitlab/cycle_analytics/summary/commit.rb
@@ -2,6 +2,10 @@ module Gitlab
   module CycleAnalytics
     module Summary
       class Commit < Base
+        def title
+          n_('Commit', 'Commits', value)
+        end
+
         def value
           @value ||= count_commits
         end
diff --git a/lib/gitlab/cycle_analytics/summary/deploy.rb b/lib/gitlab/cycle_analytics/summary/deploy.rb
index 06032e9200e..099d798aac6 100644
--- a/lib/gitlab/cycle_analytics/summary/deploy.rb
+++ b/lib/gitlab/cycle_analytics/summary/deploy.rb
@@ -2,6 +2,10 @@ module Gitlab
   module CycleAnalytics
     module Summary
       class Deploy < Base
+        def title
+          n_('Deploy', 'Deploys', value)
+        end
+
         def value
           @value ||= @project.deployments.where("created_at > ?", @from).count
         end
diff --git a/lib/gitlab/cycle_analytics/summary/issue.rb b/lib/gitlab/cycle_analytics/summary/issue.rb
index 008468f24b9..9bbf7a2685f 100644
--- a/lib/gitlab/cycle_analytics/summary/issue.rb
+++ b/lib/gitlab/cycle_analytics/summary/issue.rb
@@ -9,7 +9,7 @@ module Gitlab
         end
 
         def title
-          'New Issue'
+          n_('New Issue', 'New Issues', value)
         end
 
         def value
diff --git a/lib/gitlab/cycle_analytics/test_stage.rb b/lib/gitlab/cycle_analytics/test_stage.rb
index 3ef7132bcc3..10402a1d7cd 100644
--- a/lib/gitlab/cycle_analytics/test_stage.rb
+++ b/lib/gitlab/cycle_analytics/test_stage.rb
@@ -13,12 +13,16 @@ module Gitlab
         :test
       end
 
+      def title
+        s_('CycleAnalyticsStage|Test')
+      end
+
       def legend
         _("Relative Builds Trigger by Commits")
       end
 
       def description
-        "Total test time for all commits/merges"
+        _("Total test time for all commits/merges")
       end
 
       def stage_query
diff --git a/lib/gitlab/i18n.rb b/lib/gitlab/i18n.rb
index a7addee0dcd..9081ced0238 100644
--- a/lib/gitlab/i18n.rb
+++ b/lib/gitlab/i18n.rb
@@ -11,5 +11,15 @@ module Gitlab
     def available_locales
       AVAILABLE_LANGUAGES.keys
     end
+
+    def set_locale(current_user)
+      requested_locale = current_user&.preferred_language || ::I18n.default_locale
+      locale = FastGettext.set_locale(requested_locale)
+      ::I18n.locale = locale
+    end
+
+    def reset_locale
+      ::I18n.locale = ::I18n.default_locale
+    end
   end
 end