Some of these old Eastern Bloc countries have had fascinating changes in language and written script in the last hundreds years or so. Uzbekistan is another interesting one, which currently uses Cyrillic, Latin, and Arabic (actually Nastaleeq) scripts despite Latin being the official script since the 90's. I had a really fun time building the BBC Uzbek website which had to support all of these:

- http://www.bbc.com/uzbek (Cyrillic)

- http://www.bbc.com/uzbek/lotin (Latin)

- http://www.bbc.com/uzbek/afghanistan (Arabic)