I can't help but find it a little entertaining that this entire post is over "trine" and tridays when we have TONS of people that say things ic like "my bad" ... The most cringeworthy thing I saw someone type ic was "pots" referring to potions... my character was incredibly confused. But hey! I really only think I saw this happen once or twice, and once upon a time at this point. Maybe the person learned!
The problem is born of two things that are both a blessing and a curse of this server. We as players have an amount of creative freedom and can impact the server just as much as the server impacts us by just doing our own thing. There is also no set standard, and we have an extraordinary amount of diversity. And this is what people are getting upset over? Yes, people HAVE made it a big deal in this post and are blatantly judging others for using those words. So here is a suggestion ... you don't like when it's used, don't use it. Lead by example and push the sort of language you'd like to see being used. To be the cornball I am - Be the change you want to see Newer players will adapt when they see what you do. One of the beauties of this being such a big and diverse server is that we get to have an effect on other people's RP and RP styles just by doing our own thing. When you start judging, others will be less likely to see the points you've made as constructive and productive.
I was very confused by bags when it came about. I don't really see it being used soo often, but then again, my characters aren't involved in as much trade as others are. I don't remember it being used so much in the past ... but hey, we adapt. I will use the words 'gold' and 'coins' mostly unless someone comes to me asking about 'bags'. Funnily, I think I said tenday more often than I say triday. Sometimes it feels weird to say "yesterday" in game because truly many people will take that for the previous ooc day when that may not necessarily be what you're trying to convey. And to add even more confusion, let's throw in all the different time zones people play in here. Yes, it probably did come about for ooc reasons, which in itself is a bit obnoxious, but thinking on it from an ic perspective, it is a very natural way to organize days. We say a month or a week when we're referring to 30 days or 7 days, right? A fortnight is a unit of time equal to 14 days (two weeks). The word derives from the Old English term fēowertīene niht, meaning "fourteen nights" (or "fourteen days", since the Anglo-Saxons counted by nights) ((Copied from Wiki)). If it's not easy for you, then don't say it. If there was an ic standard that 'yesterday' meant the previous ic day, and not the previous ooc day, I guarantee you this wouldn't be as much of an issue as it currently seems to be.
Personally, I'm the person that doesn't like the whole "let's run around everywhere" thing, my character even made a comment to someone once telling them not to trip! Yes, I'm that troll. But I'm not going to make a post telling everyone they should walk everywhere. (Although I'm pretty sure someone already has). Arelith is a HUGE server, with people of different ages coming from all different types of experience levels, backgrounds, and interests. Maybe this is the unpopular opinion but let them play how they want to and just do you. Like Morgy said, people will learn.