Add locales for conversation API controller

config/locales/diaspora/en.yml

@@ -340,6 +340,7 @@ en:
     destroy:
       delete_success: "Conversation successfully deleted"
       hide_success: "Conversation successfully hidden"
+    not_found: "Conversation not found"
   date:
     formats:
       fullmonth_day: "%B %d"
@@ -950,6 +951,10 @@ en:
         login_required: "You must first login before you can authorize this application"
         could_not_authorize: "The application could not be authorized"
 
+  error:
+    not_found: "No record found for given id."
+    wrong_parameters: "Some parameters are wrong or missing."
+
   people:
     person:
       thats_you: "That’s you!"