DaveKaretnyk, It would be a lot easier on you to just install the English Language Pack.
I'm about to receive a Inspiron 17 7000, but due to my location it was only possible to buy a system with Windows 8.1 Pro Dutch language version only. I only want an English language interface on the laptop so I guess I have two choices 1) Get it up and running and then install the English language pack. And never use the Dutch ui again ;-) 2) Complete re-install with Windows 8.1 Pro English. I do have access to a license (I have a Microsoft MSDN subscription) so that's not a problem. But it's a while since I've done this and I've just starting reading about UEFI, Secure Boot, and so on. And more importantly I wonder if that messes up my warranty/maintenance in some way? For simplicity, I'm tempted by the first option. But does it have limitations or restrictions compared to the second? Appreciate any suggestions? 
English language pack or re-install Win8.1 English?