Microsoft, guys, you must add the standard Bulgarian Keyboard layout on Windows 10 Mobile. As of now it is shipped with some awful Phonetic layout that is wrongly claimed to be "Bulgarian". Well, it is not!
We have a national standard for Bulgarian keyboard layouts (БДС/BDS). Please, add it! And also properly tag the currently included keybaord as "Bulgarian Phonetic".
For other countries you have both traditional and phonetic layouts. So, it is quite possible to add it, too.