Merge pull request #70 from caouecs/develop

Correction pt-BR
Merge pull request #72 from caouecs/develop

Add Vietnamese version
Merge pull request #75 from caouecs/develop

Fix on Vietnamese (vi)
Update validation.php

Fixed typo.
Merge pull request #76 from iflow/patch-1

Update validation.php
Merge pull request #77 from caouecs/master

(de) fix