To tell teacher friend about grammar error?

[ImaSababa]

A friend of mine is a primary school teacher, and is making and selling cushions on Facebook. Lovely. The problem is, they're riddled with mistakes, such as "Christmas at the Johnson's" when surely is should be "Johnsons'".

Should I tell her?

Yes, in private though.

Nope. Shortened version of Christmas at the Johnson's house.

Plural version would be Christmas with the Johnsons.

No. I’d hate you (even though you’re correct).

of course not.
is this serious.

I think @TheMobileSiteMadeMeSignup is right so it is correct.

@TheMobileSiteMadeMeSignup

Nope. Shortened version of Christmas at the Johnson's house.

Plural version would be Christmas with the Johnsons.

^^This

It would be Johnson's !!!

@TheMobileSiteMadeMeSignup

Nope. Shortened version of Christmas at the Johnson's house.

Plural version would be Christmas with the Johnsons.

This. Your friends grammar is correct.

Surely it would only be Johnsons’ if they were Peter and Mary Johnsons? If they are Peter and Mary Johnson (as I assume they are) then Johnson’s is correct

Johnson's is correct!

But in English we refer to families in the plural: Mr and Mrs Johnson are 'the Johnson's', which means that the apostrophe should come after the s: The Johnsons'.

Argh, Mr and Mrs Johnson are 'The Johnsons'!

She’s correct.

@TheMobileSiteMadeMeSignup

Nope. Shortened version of Christmas at the Johnson's house.

Plural version would be Christmas with the Johnsons.

No, that is wrong. It’s Christmas at the Johnsons’ house. Or Christmas at the Johnsons’. The Johnson’s makes no sense, ever. I would tell her.

Johnsons' is right. I wouldn't say anything though.

It's a shortening of "at the Johnsons' house".

I just think she ought to know.

Oh god.

Assuming there’s more than one Johnson in the family, OP is correct. Cushion is wrong.

Well I’d want to know.

I’d tell her. I’d feel like a dick doing it but surely she’d rather know.

I'm twitching at this, because I'm convinced it should be "grammatical error" in your title. The word "grammar" is a noun, not a verb nor an adjective, so it would not commonly be used as a modifier.

However, having refreshed my memory on the parts of speech, I recall that a noun adjunct can be used as a modifier (for example, "School room" or "Head's office".)

Any road, I'd say nowt. Definite lead balloon situation.

She’s right unless you’re using a changed example and the original ended in an S

You ommited a question mark at the end of your sentence. More attention to your own grammar before opining on other people.

OP is correct! Can’t believe so many people think she’s wrong!

Sorry ignore me I’m being dim arent I

@itssquidstella

But in English we refer to families in the plural: Mr and Mrs Johnson are 'the Johnson's', which means that the apostrophe should come after the s: The Johnsons'.

Mr and Mrs Johnson are the Johnsons. No apostrophe. You visit their house - the Johnsons’ house. Christmas at the Johnsons’ (house). Or Christmas with the Johnsons ( the people).