Change a few words in Prestashop

Hi everyone. I got a page called Sveder-meget that I would like 5-6 words to be translated, the job should not take much more then 5 min if you have been working in Prestashop before Underneaf the counter it says "Kunderservice", it should be changed to "Kundeservice". When the cart is emty it should be changed to "Din indkøbskurv er tom" Underneaf "Dine fordele" The point gratis fragt ved køb over xx should be changed to "Altid GRATIS fragt!" In the footer "e-mail mail" should be changed to "" Since the job is a 5 min job, our budget to this is very very low