Support for non-english categories

app/assets/javascripts/discourse/components/utilities.coffee

@@ -11,15 +11,21 @@ Discourse.Utilities =
       when 'large' then size=45
     return size
 
+  categoryUrlId: (category) ->
+    return "" unless category
+    id = Em.get(category, 'id')
+    slug = Em.get(category, 'slug')
+    return "#{id}-category" if (!slug) or slug.isBlank()
+    slug
+
   # Create a badge like category link
   categoryLink: (category) ->
     return "" unless category
 
-    slug = Em.get(category, 'slug')
     color = Em.get(category, 'color')
     name = Em.get(category, 'name')
 
-    "<a href=\"/category/#{slug}\" class=\"badge-category excerptable\" data-excerpt-size=\"medium\" style=\"background-color: ##{color}\">#{name}</a>"
+    "<a href=\"/category/#{@categoryUrlId(category)}\" class=\"badge-category excerptable\" data-excerpt-size=\"medium\" style=\"background-color: ##{color}\">#{name}</a>"
 
   avatarUrl: (username, size, template)->
     return "" unless username

app/assets/javascripts/discourse/routes/list_category_route.js.coffee

@@ -3,11 +3,14 @@ window.Discourse.ListCategoryRoute = Discourse.FilteredListRoute.extend
 
     slug = Em.get(model, 'slug')
     category = Discourse.get('site.categories').findProperty('slug', slug)
+    category ||= Discourse.get('site.categories').findProperty('id', parseInt(slug))
     category ||= Discourse.Category.create(name: slug, slug: slug)
 
     listController = @controllerFor('list')
-    listController.set('filterMode', "category/#{category.get('slug')}")
-    listController.load("category/#{category.get('slug')}").then (topicList) =>
+
+    urlId = Discourse.Utilities.categoryUrlId(category)
+    listController.set('filterMode', "category/#{urlId}")
+    listController.load("category/#{urlId}").then (topicList) =>
       listController.set('canCreateTopic', topicList.get('can_create_topic'))
       listController.set('category',category)
       @controllerFor('listTopics').set('content', topicList)

app/assets/javascripts/discourse/views/modal/edit_category_view.js.coffee

@@ -32,7 +32,7 @@ window.Discourse.EditCategoryView = window.Discourse.ModalBodyView.extend
 
   saveSuccess: (result) ->
     $('#discourse-modal').modal('hide')
-    window.location = "/category/#{result.category.slug}"
+    window.location = "/category/#{Discourse.Utilities.categoryUrlId(result.category)}"
 
   saveCategory: ->