1 files changed, 18 insertions, 0 deletions
diff --git a/rubocop/cop/static_translation_definition.rb b/rubocop/cop/static_translation_definition.rb
index 736d8767342..55956d9665b 100644
--- a/rubocop/cop/static_translation_definition.rb
+++ b/rubocop/cop/static_translation_definition.rb
@@ -21,6 +21,8 @@ module RuboCop
         method_name = node.children[1]
         return unless TRANSLATION_METHODS.include?(method_name)
 
+        translation_memoized = false
+
         node.each_ancestor do |ancestor|
           receiver, _ = *ancestor
           break if lambda_node?(receiver) # translations defined in lambda nodes should be allowed
@@ -30,6 +32,14 @@ module RuboCop
 
             break
           end
+
+          translation_memoized = true if memoization?(ancestor)
+
+          if translation_memoized && class_method_definition?(ancestor)
+            add_offense(node, location: :expression)
+
+            break
+          end
         end
       end
 
@@ -38,6 +48,14 @@ module RuboCop
       def constant_assignment?(node)
         node.type == :casgn
       end
+
+      def memoization?(node)
+        node.type == :or_asgn
+      end
+
+      def class_method_definition?(node)
+        node.type == :defs
+      end
     end
   end
 end