Fix french cities translation to match with the parse method instead of the fetch one

Hi, 

The cities in the french translation were strings in array. Since Address.city is calling the data via Base.parse, and the array didn't match the regexp for formatted strings, Address.city was returning empty strings.

I change the translation to be a formated string refering to a new translation key.

I haven't seen any tests for the translation files, so I didn't write any. Do you want me to write some anyway ?

Cheers,

-- 
Stéphane Akkaoui