Okay, here it goes in hungarian: "Három szomorú tigris"
Not bad at all :)

We have some similar tounge twisters too, like
"Bedezodorozott luxus Moszkvics slusszkulcs" I still can't pronounce it in one go :D The "s" is my nightmare...
It means "Deoranted luxury Moskwich igniton-key" Sounds stupid isn't it? We invented this with my friends :D

The next one with "r" twisting: "Répa, retek, mogyoró. Korán reggel ritkán rikkant a rigó" it means "Carrot, radish, peanut. Early in the morning the throstle rarely twitters" This is a folk invented one :D

Shouldn't it be "Three swiss witch-bitches who wished to be switched swiss witch-bitches", though?:P

I would translated in greek if I had any idea what switched swiss witch-bitches meant. I can understand swiss witch bitch, but what is a switched swiss witch bitch? Switched in what way? Sex change?

There are two sentences thare used in greek but they are more used as jokes than anything else. One is " μια πάπια με παπιά μα "muck, I can't remember how it goes. So many years ago, I can't remember them. :cry:

That's not a good test.
It's far too easy.

the tch and th sounds are very basic in a person's vocabulary.
I myself use the "Woodchuck" and "Seashells" tongue twisters, being the most difficult to complete succesfully (The entire thing)

Well here's what I came up with tonight (with a few hours practice I'd be much better, but I'm too sleepy right now).

Witches

EDIT - I think the seashells are really difficoult - woodchuck isn't that hard...

Try this:
She sells sea shells by the sea shore.
The shells she sells are surely seashells.
So if she sells shells on the seashore,
I'm sure she sells seashore shells.

Yah it is.
Reason Woodchuck is hard is that the complete version goes on forever.
You're bound to mess up somewhere.

Anyone notice the topic name is "Do your think you can speak english?"

at least it makes sense.
seashells is easy.
try:
Red lorry Yellow lorry (repeat ad infinitum)

Pfft you should check the Dr Seuss tongue-twister book. That's hard.

yeah it is.

Red Leather Yellow Leather is hard too.

I learned the trick to doing "toy boat" this summer, so now it's pretty easy.

?ríbrotin blý-kringla, ?ríbrotin blý-kringla *repeat*

Stebbi stó? á ströndu
var a? tro?a strý
strý var ekki tro?i? fyrr en stebbi tr??i strý.

Hno?ri úr nor?ri ver?ur a? ve?ri ?ó a? sí?ar ver?i.

Rómverskur riddari ré?st inn í rómarborg r?ndi og rupla?i rabbarbara og rófum.

Sea-shells are quite easy, in my opinion..