Right.

I'm astonished that I couldn't find anything to that search word in this here guide. Not in any language... And aren't tongue twisters one of our favourite
mean little games we love to play with our foreign or drunken (or best of all both) friends?

So I have to do it by myself - with lots of help, I hope. Every contribution highly welcome and credited by me trying to pronounce it ;-). Credits to you ;-).

How much wood could a woodchuck chuck, if a woodchuck could chuck wood? He would chuck as much wood as a woodchuck could if a woodchuck could chuck wood.
This was completed by Bluebottle (who can't say ventriloquist), and the next one was made up by him:

Fish shop chips are chip-chopped by the fish shop chip chopping chap.

She sells sea-shells on the sea-shore - the shells she sells are sea-shells I'm sure - but if she sells sea-shells on the sea-shore - then I'm sure she sells sea-shells.

If Peter Piper picked a peck of pickled pepper - Where's the peck of pickled pepper Peter Piper picked???
both by Maid Marion.

Red lolly, yellow lorry

I'm not a pheasant plucker, I'm a pheasant plucker's son, and I'm only plucking pheasants until the pheasant plucker comes!
both by Cookie Monster, who gets a chocolate fishie for the last one.

Nasty Navynecks nick naked noodles.
a Findus original... like the next one:

Nonneney, North sea.

Fuzzy duck, ducky fuzz.
Cafram said to say it 3 times fast!

Fischers Fritze fischt frische Fische, frische Fische fischt Fischers Fritze.
... meaning:
Fritz Fisher fishes fresh fish, fresh fish fishes Fritz Fisher. (--- wrong grammar, but I'll translate it word by word ;-)

Brautkleid bleibt Brautkleid, Blaukraut bleibt Blaukraut.
... meaning:
wedding gown remains wedding gown, red cabbage remains red cabbage... (--- quite senseless, I know...)

In einem dichten Fichtendickicht nicken dicke Fichten tüchtig.
... meaning:
In a thick fir forest fat firs nod industriously... (--- Sounds stupid, but if you exchange the bold letters it gets a naughty meaning ;-)

In einem dichten Fichtendickicht picken dicke Finken tüchtig.
... meaning:
In a thick fir forest fat finches peck industriously... (without the naughty bits...by Fraenk).

Ich hatte eine Mutter mal, die hatte mal ein Muttermal.
... meaning:
I once had a mother who once had a birthmark *hm...*, told by CatConan.

Wenn Fliegen hinter Fliegen fliegen, fliegen Fliegen Fliegen hinterher....
... meaning:
If flies fly behind flies, flies fly behind flies. Findus said to "Try to reduce speech time onto half a second *bsssssss*".

Der Kaplan klebt Papp-Plakate.
... meaning:
The priest pastes cardbord-posters...

Wenn Du Wachsmasken magst, Max, dann mach Wachsmasken.
... meaning:
If you like waxmasks, Max, make waxmasks - hard in english, too -

both to be said three times and told by Researcher 98829!

Trentatre trentini trotterellavano in trento tutti e trentatre trotterellando.
... meaning:
Thirtythreee Trentinians (people from Trento) were trottering in Trento all thirtythree trottering.

Sopra la panca la capra campa, sotto la panca la capra crepa.
... meaning:
On the bench the goat lives, under the bench the goat dies. Both provided by Valex.

Un chasseur qui chasse snas son chien est un bon chasseur.
Told by Cafram, but I don't know what it means, my french isn't that good...

De kat krabt de krullen van de trap.

Het spaanse graan heeft de orkaan doostaaan.
Told by Findus who couldn't tell the translation ;-)

If you now some more -----------> please, pretty pleeeeeeeease post in the forum below ;-)