tanque

Yes, wocommerce have all local files… and run in portuguese at start. After import this change to en_US following core settings (in woocommerce status)

Screenshots:
Ganeral Settings page
http://www.screencast.com/users/EduTanque/folders/Jing/media/40675232-da1b-4026-807d-fe556feed0c2

Woocommerce Status page
http://www.screencast.com/users/EduTanque/folders/Jing/media/dc489d3d-2aad-42bf-b7e7-511843a34064

Database language settings(i do not change manually)
http://www.screencast.com/users/EduTanque/folders/Jing/media/6a8e57ee-484e-4e53-a87a-3af892c58968

Woocommerce language files (automatic installed)
http://www.screencast.com/users/EduTanque/folders/Jing/media/2f4c1952-5753-4519-a84d-ba488fdc1963