[fix] Force use of 2 char langcode. Prevent double load of english json file.
[fix] Force use of 2 char langcode. Prevent double load of english json file.

YunoHost/yunohost-admin,N4rius/yunohost-admin,N4rius/yunohost-admin,yunohost-bot/yunohost-admin,N4rius/yunohost-admin,N4rius/yunohost-admin,yunohost-bot/yunohost-admin,YunoHost/yunohost-admin,yunohost-bot/yunohost-admin