Not really. MMORPGs are just MMOCCs with a combat system. As far as I'm concerned MMOCC doesn't mean 2D, It doesn't mean isomeric, it means chatting community which is exactly what an MMORPG is with obviously an RPG system too.
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if you want to learn how to make a online game go to http://www.mmoccforum.com/ :)
Arn't they php? Jsva would be the best for starters.
I'd say c++
If I personally was going to make an MMORPG I would use Lingo. I have knowledge of the program and since I don't know one MMORPG that has used it, I would do it for the status since 'offline' MMORPG's are C++, I would make an 'online' MMORPG with Lingo. As George has been saying, it is ideal for MMO's in general.