It can be very frustrating if there is an actual server-sided problem, or administrative query/problem that someone wants to bring up, but can't due to the lack of OOC.
If there is a dire problem rules can be ignored. Most likely that won't happen, and I've developed the skill of enforcing rules while still following them. For example, if someone talks out of character I respond in character treating them as a madman, because they speak gibberish. Finally, I've set rules but don't expect them to be followed 100% of the time. I'll let things slide, it's up to each individual's drive to follow the rules for them to be enforced.
You'll also very much find (unless you have rules on joining) that a number of people joining the server will immediately start by typing "hello" and other such stuff, like questions about the server.
It's passworded. Only people coming from this topic know how to join.
You may also find you attract a number of immature roleplayers used to Family Rps and being children.
Again, passworded.
A number of them like to pretend to be a child, but then constantly talk and get in the way and try to revolve the roleplay around them.
If anyone tries to do anything along this sort, the roleplay will follow suit. Following suit doesn't necessarily mean actually giving this person attention. For example, we can denounce the child as an attention seeker and have our characters ignore them...just like in real life. If it gets too out of hand I just ban them.
I know you want actual language, but it is probably better to just stick to normal english for a mixture of both clarity and realism.
Normal English isn't realistic either. In order for things to be realistic we need to invent a language, but that's too impractical. I included Old English so it can help people step out of their daily lives and get in the roleplay mood. It's productive to remove people from their ego's, but unproductive to get hung up on little things like realism in this regard.
You may also find that players often need a little bit of backbone to get them going. A tent or two, or a campfire or something can really set a roleplay in motion.
I plan on starting with a campfire, us settling down for the night...and I'll tell stories that start the civilization adventure.