Change the file organization, and Casual Honorifics is now Informal Honorifics.

config/locales/devise.fr_tu.yml → config/locales/devise.fr_informal.yml

@@ -3,7 +3,7 @@
 #   the COPYRIGHT file.
 
 
-fr_tu:
+fr_informal:
   errors:
     messages:
       not_found: "introuvable"

config/locales/fr_tu.yml → config/locales/fr_informal.yml

@@ -3,10 +3,10 @@
 #   the COPYRIGHT file.
 
 
-# Localization file for French (Casual Honorifics). Add more files in this directory for other locales.
+# Localization file for French (Informal Honorifics). Add more files in this directory for other locales.
 # See http://github.com/svenfuchs/rails-i18n/tree/master/rails%2Flocale for starting points.
 
-fr_tu:
+fr_informal:
   hello: "Bonjour tout le monde"
   application:
       helper: