Music Rhythms and Whatnot

Every music in the world has its intricacies, flavours, and merits, but there is something about African music that is heartbreakingly, poignantly beautiful. Something about the raw and traditional sounds of a drum, smooth voices, and various beaded instruments. It’s all so…simple, and it allows the singers to really work the melodies, not necessarily with bar lines, just the feel of the sounds all melding together. It is similar to Slavic music in this way, though inherently very different.
http://en.wikipedia.org/wiki/Bulgarian_dances
http://en.wikipedia.org/wiki/Additive_rhythm
A dear piano teacher of mine once introduced me to the concept of irregular metre with the following Bulgarian song, and it's stuck with me since. The metre is divided into groups of 2 and 3, respectively.
http://www.youtube.com/watch?v=TcHhz1XLWeA
I tried to find the lyrics to this online in English, but alas, there's very little about it, considering how popular it's become. 
I've tried to put the counts where they fall in the singing during the first "verse".  
12 12     123 
Erghen diado
12  12    123
Erghen diado
1212123  1212123
Hei-ta-ka   pa ta ka
12 12 123   1212 123
Nakrivile    kalpatcheco
12  12 123   12 12 123
Hei-ta-ka   pa-ta-ka
etc. 
I think this is fascinating! I don't know much about it and it's difficult to absorb all the info from wiki in one sitting, but listening to more Bulgarian music will be helpful.