Okay, so you know how when you talk to someone who comes from a different place than you, they might speak a little differently than you do? That's called a dialect.
Well, in Bulgaria, there are a lot of different dialects because there are lots of different places and different groups of people who live there. One of these dialects is called the Banat Bulgarian dialect.
Now, the Banat Bulgarian dialect comes from a place called Banat, which is in the western part of Bulgaria. And just like how you might say things differently than someone from a different town, people who speak the Banat Bulgarian dialect say things differently than people who speak other Bulgarian dialects.
For example, instead of saying "zdrasti" to say hello like many other Bulgarians do, people who speak the Banat Bulgarian dialect might say "de fer oda?" And instead of saying "shte otida na magazina" to mean "I'm going to the store," they might say "shoj iasha ka magazina."
So basically, the Banat Bulgarian dialect is just another way that some people in Bulgaria talk, and it has its own unique words and pronunciations.