diff --git a/app/models/budget/group.rb b/app/models/budget/group.rb
index 37d6e658b..d316d2512 100644
--- a/app/models/budget/group.rb
+++ b/app/models/budget/group.rb
@@ -4,6 +4,19 @@ class Budget
 
     translates :name, touch: true
     include Globalizable
+    translation_class_delegate :budget
+
+    class Translation
+      validate :name_uniqueness_by_budget
+
+      def name_uniqueness_by_budget
+        if budget.groups.joins(:translations)
+                        .where(name: name)
+                        .where.not("budget_group_translations.budget_group_id": budget_group_id).any?
+          errors.add(:name, I18n.t("errors.messages.taken"))
+        end
+      end
+    end
 
     belongs_to :budget
 
diff --git a/app/models/budget/group/translation.rb b/app/models/budget/group/translation.rb
deleted file mode 100644
index 36489eb10..000000000
--- a/app/models/budget/group/translation.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-class Budget::Group::Translation < Globalize::ActiveRecord::Translation
-  delegate :budget, to: :globalized_model
-
-  validate :name_uniqueness_by_budget
-
-  def name_uniqueness_by_budget
-    if budget.groups.joins(:translations)
-                    .where(name: name)
-                    .where.not("budget_group_translations.budget_group_id": budget_group_id).any?
-      errors.add(:name, I18n.t("errors.messages.taken"))
-    end
-  end
-end