So, a long long time ago, there were two different ways to write things. One way was with special letters that the Bulgarian people used, and the other way was with a different set of letters that the Latin people used. These two different ways of writing things caused some problems because people who spoke Bulgarian couldn't always understand things written in Latin and people who spoke Latin couldn't always understand things written in Bulgarian.
Because of this, there were some wars between the Bulgarian people and the Latin people. The Bulgarian people wanted to keep using their special letters to write things, but the Latin people thought that everyone should use their letters.
The wars happened a long time ago, when people didn't have machines to make their writing nice and pretty like we do today. Instead, people had to write everything by hand, and it was hard and time-consuming. So, the wars went on for a while, and eventually, the Bulgarian people won and got to keep using their letters.
Nowadays, we don't really have this problem anymore because people can write things on computers, and the computers can turn one set of letters into another really easily. But it's still interesting to think about how different groups of people have different ways of doing things, and sometimes that causes problems that need to be solved.