Sliver v. Slither

[Itsallaloadofbollocks]

New to MN and I posted this on an AIBU thread earlier today. Someone mentioned Pedants' Corner so I decided to start this thread. I've noticed more people are now saying slither when talking about a sliver of something. Am I alone in finding this really annoying?
It's SLIVER not SLITHER 😡 SLITHER is what snakes do! If you have a splinter you have a SLIVER of wood in your finger.

Could be their accent?

If I'm talking about a sliver of cake, it sounds like sliver.

If I'm talking about a slithering snake, it also sounds like sliver.

I’ve never heard anyone mix up the two, but agree with PP that it could be down to their accent.

I know people who would talk about snakes ‘slivvarin’ for example…

No. I have heard it from people with different accents and standard pronunciation.

Lol that'd be me, unfortunately.

Yep I've definitely heard people mix these up, and write the wrong one too!

I understand and agree with the comments about accents because I have one. However, I found this definition in an online dictionary so slither appears to be creeping in to more common usage. It grates on me. I have visions of bacon moving 'smoothly over a surface with a twisting or oscillating motion'.
slither
[ˈslɪðə]
VERB
move smoothly over a surface with a twisting or oscillating motion:
"I spied a baby adder slithering away"
NOUN
a slithering movement:
"a snake-like slither across the grass"
BRITISH
INFORMAL
a sliver:
"a slither of bacon"

The accent thing is unlikely, because it’s people using slither when it should be sliver.

@CindersAgain yes I thought that myself before I posted, but at the same time maybe there are regional accents where they'd sound the same.

Definitely not accent in the books I've read with the same mistake, and it's been several.

Some years ago I actually stopped reading a book in which the characters, for some reason, ate a great deal of cake which was always served in 'slithers'.

It annoyed me so much I decided finishing the book wasn't worth the annoyance it was causing me.

I'd imagine it's because they're similar sounding words that people don't use all that often, and so confuse the two. People mixing up 'weary' and 'wary' is one I notice quite a lot on MN.

Well yes, that are similar sounding but I suspect it's more about people hearing sliver and thinking that the v sound should be a th sound because they don't know any better.

It's a bit like people saying 'myself' when they should be using 'me', or 'I' when they should be using 'me'.

They don't know the correct usage and so plump for what they think sounds 'posher'.