How can I add new translations to the classic theme?

[Sixhop]

Hello,

I'm trying to add new translations to the classic theme. I've adjusted the my-account.tpl to welcome customers in a special group with a nice heading:

{l s='Welcome to your dealer account' d='Shop.Geda'}

As of http://build.prestashop.com/howtos/translation/how-to-translate-your-theme/ I would expect, that the translation is recognized within the translation manager in the prestashop backend. But I'm not able to find these translations. How can I rescan all template files for new translations to be able to see them in the translation manager and translate them?

Cheers
Andi