That was perfect!
I could tell how hard you worked on this one and guess what; it was worth it!
I rarely review, but i though i'd write some minor detail that you could fix on your future flashes.
-When there is a close up on someone's face you should add more detail both on the lip-sync and on the drawings. I know from personal experience that the pencil tool is not for this kind of work. I'd recommend you tried the brush, since i believe you use a drawing tablet. Just practice with it and you'll see how much better it is. But if you already did and preferred the line, then you could add details with the brush tool.
-Hurray for the Greek letters!! I'm from Greece and it was really unexpected to see greek letters all over the place and i was really happy about it for some reason. I didn't care if they weren't correct, but if you need any help with translation or anything in the future i'd be more than happy to help you :D
-I also read about the subtitles that you want to add. Now, i don't know how to code the subs inside the flash, but here is my idea; add two layers in your flash,
take them to the top. The one on the top will have the subtitles (which you have to write), while the one underneath it will be a rectangle with a transparent color (scale the Aplha at 50% or something) that makes the subs more visible.
That's it about my review, i hope i helped even a little. 5/5 10/10
Please excuse mistakes in grammar, if I made any :)