Bthoven,
1) Thai language - yes it does display it, if you install Thai font.
Can you please, take minute and send a sample of Thai book (not in pdf) to
info@PocketBookReader.com, I'll double check it.
2) Dictionaries lookups - yes
3) Accessories - leather cover, 1 Gb SD card, wall charger
4) PRC format is supported and displayed all right.