That's a really cool project!
Some suggestions I would make:
Use all skill and monster names from all regions, i.e. it shouldn't just say Professor for example but also Scholar.
Or for monster names, Cathryne Keyron and Kathryne Keyron and Katrinn, and marked on which region which name was used.
For skills, from what I can remember, fRO(euRO) used Highness Heal instead of High Heal.
Also maybe, if possible to dig that deep into the past, it would be super interesing and cool to have all updates Ragnarok has ever had listed for each server.
I.e.
iRO - Episodes 1 to now (Main server)
iRO - Classic Loki (Classic server defunct)
euRO - Episodes 1 to 1x (Burda:ic)
fRO/euRO - Episodes 1x to server termination (WhyBe)
And what I personally would be most interested in:
A page with ALL of the official artwork of Ragnarok Online in lossless .png quality.
Including Startup/Login screen, Loading screens, Class Artworks, etc.