title: Translation in odoo 10
body: <p>i need to add translation for following modules, purchase, sales and accounting for Arabic. I found Arabic translation in odoo, but its not completed. I have exported *.pot file for purchase module. and placed it in my custom module  <strong><em>mymodule/i18n/purchase.po</em></strong>(i replaced extension as *.po). And added msgstr in *.po file.
  Now is the problem. i don't know how to use this modified *.po file. Pls help.</p>