There really is no hope!

[WhenFRUITYgotstuckupthechimney]

I'm starting to get very frustrated with the way DP's family use the English language.

Now, I'm far from perfect and I'm sure I will make all sorts of mistakes on this post but:
"I will lend it off of you" ????

This is coming from my future FIL's mouth. I then have DP, MIL and then little SIL (aged 10) agreeing that he is making perfect sense I apparently came across as rude and snobby (DP's opinion) for having a debate about it and said I should have just kept my mouth shut.
Bloody cheek.
What's wrong with wanting my future family to be able to speak properly? Especially as they spend a lot of time with our DS!
He has already learnt "I got ya" instead of "I've got you"

perhpas you should have checked where in the country his family came from/dialec/accents etc before getting toegether with him

Fair enough to be annoyed about it, but it is rather bad manners to pick someone up on their use of language, unless it's the dh or the dc of course!

Are they Northern?

When I moved up here I was confused by the lend thing..."Can I lend it off you?" was fairly standard here,whereas I would say "Could I borrow x please?"

I get frustrated,but I guess it could be a lot worse,I mean, are they generally kind and loving?If so I would excuse some iffy vocabulary

I'd be frustrated but it is extremely rude to comment and then argue about it. Correct your ds if you have to, leave your FIL alone.

Fortunately for me, my inlaws don't speak English, but just to let you know that in other languages the words 'lend' and 'borrow' may be the same, with perhaps a preposition to differentiate, or judicious use of pronouns.

I'm afraid that even in pedants' corner, you're not going to get much sympathy for this.

Yes you can inwardly seethe, but you won't change them. So suck it up.

It would annoy me too, but I think it's probably too late (and not your place) to change your FIL. However, you should of course point out to your own DCs in private that it is incorrect and ensure they don't pick up on his bad habits!

The "argument" was all very tongue in cheek anyway, we were sort of laughing about it which is why I was so shocked to be called rude and snobby by DP.
They are all English, from London - same as me

I was about to say that it's a regional dialect thing and that it's not necessarily wrong, just different but I just saw your last post and they're from London. I'm from London too. I've heard people say "lend" instead of "borrow" but not usually Londoners.