diff --git a/app/controllers/posts_controller.rb b/app/controllers/posts_controller.rb
index 4d999d9..fbe9036 100644
--- a/app/controllers/posts_controller.rb
+++ b/app/controllers/posts_controller.rb
@@ -11,21 +11,21 @@ class PostsController < ApplicationController
     @category = session[:category] = params.dig(:category)
     @layout = params.dig(:layout).try :to_sym
     # TODO: Aplicar policy_scope
-    @posts = @site.posts(lang: I18n.locale)
+    @posts = @site.posts(lang: lang)
     @posts.sort_by!(:order, :date).reverse!
     @usuarie = @site.usuarie? current_usuarie
   end
 
   def show
     @site = find_site
-    @post = @site.posts.find params[:id]
+    @post = @site.posts(lang: lang).find params[:id]
     authorize @post
   end
 
   def new
     authorize Post
     @site = find_site
-    @post = @site.posts.build(lang: I18n.locale, layout: params[:layout])
+    @post = @site.posts.build(lang: lang, layout: params[:layout])
   end
 
   def create
@@ -44,14 +44,14 @@ class PostsController < ApplicationController
 
   def edit
     @site = find_site
-    @post = @site.posts.find params[:id]
+    @post = @site.posts(lang: lang).find params[:id]
 
     authorize @post
   end
 
   def update
     @site = find_site
-    @post = @site.posts.find params[:id]
+    @post = @site.posts(lang: lang).find params[:id]
 
     authorize @post
 
@@ -70,7 +70,7 @@ class PostsController < ApplicationController
   # Eliminar artículos
   def destroy
     @site = find_site
-    @post = @site.posts.find params[:id]
+    @post = @site.posts(lang: lang).find params[:id]
 
     authorize @post
 
@@ -96,4 +96,13 @@ class PostsController < ApplicationController
     service.reorder
     redirect_to site_posts_path(@site)
   end
+
+  # Devuelve el idioma solicitado a través de un parámetro, validando
+  # que el sitio soporte ese idioma
+  def lang
+    return unless params[:lang]
+    return unless @site.try(:locales).try(:include?, params[:lang])
+
+    params[:lang]
+  end
 end
diff --git a/app/services/post_service.rb b/app/services/post_service.rb
index 125d4ee..4dfdba0 100644
--- a/app/services/post_service.rb
+++ b/app/services/post_service.rb
@@ -102,8 +102,19 @@ PostService = Struct.new(:site, :usuarie, :post, :params, keyword_init: true) do
     end
   end
 
+  # Devuelve el idioma solicitado a través de un parámetro, validando
+  # que el sitio soporte ese idioma
+  #
+  # TODO: DRY
   def lang
-    params[:post][:lang] || I18n.locale
+    return unless params[:lang]
+    return unless site.try(:locales).try(:include?, params[:lang])
+
+    params[:lang]
+  end
+
+  def layout
+    params.dig(:post, :layout) || params[:layout]
   end
 end
 # rubocop:enable Metrics/BlockLength