When installing Solus 4 on Virtual Box(pretty sure it would happen in a real instalation which I was about to make) when it showed language to choose there were the 3 options for Bulgarian-I wanted phonetic but when I was writing it wasn't the phonetical one...I tried the 3 versions and all were the same. After that when I had to write a name for the PC it wasn't acepted because it wasn't English and I couldn't change it...when I tried with Chinese it automatically writes in English and everything seems OK-so that's how it is supposed to be...so I switched to English, write the name, then returned to change the language from English to Bulgarian Phonetic and installed...when it was complete the language of keyboard was English, not Bulgarian...I changed it again on all places and it forced me to log out...when I did that I could't write in English and the only way to enter was via not typing password...
I have found a simillar report here- T3450
Please fix that frustrating bug, so I would be free to install :)