Unreal editor: mixed language in labels

Hi,

I just installed UR 4.15 in my Windows 10 machine which is in English.
I noticed that Launcher shown text in Spanish so I setted to English US.
But Unreal Editor show labels mixing English and Spanish:

Apart from been annoying is very inconvenient because is harder to find stuff.

Any idea how to resolve this?

FWIW I removed additional languages from Windows but only “Spanish” configuration is the keyboard which is LA:

Forgot to mention:
My location is Guatemala, Central America.
So seems that such configuration is used by editor set UI language.

To answer my own question:

Comment all keys on Internationalization of C:\Program Files\Epic Games\UE_4.15\Engine\Config\BaseEditor.ini
130043-
Maybe change ShouldLoadLocalizedPropertyNames is not needed but just in case I set to false.

Note that there are still some texts translated, perhaps in another ini file:

130044-2017-03-14+12_58_44-pintball+-+unreal+editor.png

But so far I get most of the UI in English.