Romanian Layout for Physical Keyboard is absent
Have you tried this? https://android.stackexchange.com/a/103494/241518


  What you have to do is pair your external keyboard then
  
  Go to Settings -> Language &amp; Input -> Physical Keyboard Then tap on
  your keyboard and a dialog for choosing the keyboard layout should
  appear. Choose the layouts you want (note that you have to select two
  or more to be able to switch) and then press back. Near the bottom of
  the dialog a label saying "To switch, press _____ " which, in my case,
  is
  
  CTRL + SPACE Hope this helps!


I don't have a way of trying it out myself, so I don't know what languages are available for physical keyboards. 

If that doesn't work, perhaps this app could help (External Keyboard Helper Pro- looks like there is also a demo version)? https://play.google.com/store/apps/details?id=com.apedroid.hwkeyboardhelper&amp;hl=en or free demo version: https://play.google.com/store/apps/details?id=com.apedroid.hwkeyboardhelperdemo