title: "en" vs "en-US" as default language for Windows 10 UWP (distributed worldwide)
body: <p>I'm wondering what could be not obvious consequences from the user experience perspective if I'll choose to go with default language for UWP application as "<strong>en</strong>" instead of "<strong>en-US</strong>" and provide localized resources only for "<strong>en</strong>" culture, but not for "<strong>en-US</strong>".</p>
  
  <p>Considering that there is not much text in the app I'm assuming that it should behave in English for, say, US-based users and Great Britain-based with equal experience, but just in case would like to be sure about that.</p>
  
  <p>As far as I know if you leave the default language as "<strong>en-US</strong>" and provide resources for it the app will fallback to it for, say, "<strong>en-GB</strong> users", so that's where this question arose - what are the pros and cons to go with "<strong>en</strong>" or "<strong>en-US</strong>" for application, that is distributed worldwide?</p>
  
  <p>Any thoughts?</p>