I've left the possibility to change your vote, also you have up to 3 options to pick: things are complicated.

Post in English but remain tolerant to those who are not well-versed in that language and make errors, remembering that this forum welcomes global participation.

"...this forum welcomes global participation." Exactly.
Well, if it were a British forum - or American forum - I'd have left you those guys alone, or, being their guest, just ignored illiterate posts or something. Otherwise, here we have - what did you call it? "global participation"? Exactly.
While we're global, there are people whose mother tongue is not English. Some of them have learnt it on a good level, and such guys could presumably not worry about themselves. But.
I myself worry about other people. And they are not British.
The latter could even use SMS English - among themselves. However, we have that so-called 'global participation', right?

I'll tell you about myself.
When I first came to the Net and tried to employ my "English" (which was poor enough), one of the few, and the main purpose of using English online was to improve it...
And I suppose that there are other such guys here and now.
If even they aren't very eager to learn English as such, they might still consider it a very useful tool -- for any sorts of global participation.
And while we assume such global participation here, the place is not the Globe yet.
Global participation means this place, and other places on the Web, and all other place on and beyond the Web (i.e. offline use).

I'm aware that this place is not an educational site. However, if you look at our membership, it'll become obvious to you that English natives do not outnumber other people at all. And in case you're not concerned with what these people see and what they 'learn' - I am.
I'm not correcting them. I'm trying to help. Jax, don't be selfish resting on your good-level English. Share it! I will.

And in case you're not concerned with what these people see and what they 'learn' - I am.
I'm not correcting them. I'm trying to help.

You're not correcting them, you are annoying them. There's a subtle difference.

them

If by "them" you mean Brits...
If Jax - I can hardly remember "correcting" him.

If by "them" you mean Brits...

I mean other members of the forum. As fine you know.

Are they American?

Are they American?

Where they come from is immaterial,

Well..?

(You seem to have left the reply off...)

In my fervent desire to help you with your English I would tell you what "immaterial" means. but you are more likely to remember it if you go to the trouble of looking it up.

Ah cain't hep it. Ah tried, ah really did. But, it's lak this, y'see. When we dun had thet thar war with Engand all them thar yars ago, we din' do it so sum Russian could larn us our mother tongue!

Ah dun got mah book-larnin' frum mah gran-pappy, an if'n it were gud enuf fer him, it be gud enuf fer me.

(If that doesn't stir up the pot, ah dusn't knows wat will.)

OK. End of joke. The forum language is English. Whether it's UK English or American English (there are a number of spelling differences) seems almost immaterial so long as we can understand each other. For my part, I'm inclined to cut a lot of people quite a bit of slack when I realize that they're not native English speakers and that for them, making an intelligible post is hard work. I seem to have to cut RJHowie quite a bit of slack because even though he is a native speaker of English, you'd never know it when plowing through some of his posts.

Josh, I'm getting a little less inclined to cut slack over Grammar Nazi shenanigans. I'll want to see your credentials if you keep insisting on correcting everybody else s English. You might want to ease up on that a little.

The forum language should be rotative.
That way people could practice and learn other languages.

April is finishing, in May we could speak French. You're going to like it, specially when a gorgeous woman whispers into your ear dirty things in French... there's no language for that as French.

I'll want to see your credentials...

2×2=4.
Sorry, no math PhD.

In my fervent desire to help you with your English I would tell you what "immaterial" means.

Irrelevant.

Stupid question but is it the under 18s doing the bad language?

Stupid question but is it the under 18s doing the bad language?

They are all 80+ and they hold each other in extremely high regard, but they are trying to leave an impression of a normal forum with disparity of opinion and standard internet insults.

Forum language became a dictatorship of Anglo Saxon "ohhh this is a family forum" hypocrisy.
A "family forum"? really?

Does people reads DnD posts to put their children asleep?
Do we have threads about Peter Pan?
It's your wife curious about what I posted?
Anyone teaches their children to read with rjhowie's posts?

DnD it's not a "family forum".