collection translation is happening for collections of symbols

README.rdoc

@@ -382,6 +382,11 @@ SimpleForm uses all power of I18n API to lookup labels, hints and placeholders.
         user:
           username: 'Your username'
           password: '****'
+      options:
+        user:
+          gender:
+            male: 'Male'
+            female: "Female'
 
 And your forms will use this information to render the components for you.
 
@@ -410,6 +415,10 @@ This way SimpleForm will figure out the right translation for you, based on the
       placeholders:
         username: 'Your username'
         password: '****'
+      options:
+        gender:
+          male: 'Male'
+          female: "Female'
 
 SimpleForm will always look for a default attribute translation if no specific is found inside the model key. In addition, SimpleForm will fallback to default human_attribute_name from Rails when no other translation is found for labels.
 

lib/simple_form/inputs/collection_input.rb

@@ -55,18 +55,16 @@ module SimpleForm
           value ||= common_method_for[:value]
         end
 
-        if SimpleForm.translate && [label, value] == [:to_s, :to_s]
-          translate_collection
-          [:first, :last]
-        else
-          [label, value]
-        end
+       [label, value]
       end
 
       def detect_common_display_methods
         collection_classes = detect_collection_classes
 
-        if collection_classes.include?(Array)
+        if SimpleForm.translate && collection_classes == [Symbol]
+          translate_collection
+          { :label => :first, :value => :last }
+        elsif collection_classes.include?(Array)
           { :label => :first, :value => :last }
         elsif collection_includes_basic_objects?(collection_classes)
           { :label => :to_s, :value => :to_s }