Hello, All!
No matter if they twist, turn, obstruct or break our tongue, those sentences require for sure a bit of concentration ^^ do try this at home:
EN: He threw three free throws
FR : Les chaussettes de l’archiduchesse sont-elles sèches, archi-sèches ?
ES: Tres tristes tigres tragaban trigo en un trigal.
DE: Fischers Fritz fischt frische Fische, frische Fische fischt Fischers Fritz.
Do you know more?
Little fun fact: The mentioned “Tres tristes tigres tragaban trigo en un trigal.” is here a shibboleth (or a mark) to distinguish the dialect of the Ecuadorian Mountains from the dialect of the Coastal Plains 
In Spanish, we have as well: “Pablito clavó un clavito. ¿Qué clavito clavó Pablito?” 
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Some more English tongue twisters:
She sells sea shells by the sea shore.
How much wood would a woodchuck chuck if a woodchuck could chuck wood?
Peter Piper picked a peck of pickled peppers.
This topic reminds me of a funny video by Julie Nolke on YouTube - “English is dumb”
Can you understand this conversation?
She is awesome! That was a lot of boarder and tender in just one sentence 
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Growing up, I had the extended versions!
Peter Piper picked a peck of pickled peppers
A peck of pickled peppers Peter Piper picked
If Peter Piper picked a peck of pickled peppers
Where’s the peck of pickled peppers Peter Piper picked?
Betty Botter bought some butter
But she said the butter’s bitter
If I put it in my batter, it will make my batter bitter
But a bit of better butter will make my batter better
So ‘twas better Betty Botter bought a bit of better butter
How much wood would a woodchuck chuck if a woodchuck could chuck wood?
He would chuck, he would, as much as he could, and chuck as much wood
As a woodchuck would if a woodchuck could chuck wood
Sally sells seashells by the seashore.
The shells she sells are seashells, I’m sure.
Here’s a couple more tongue twisters shared by @SKrausser!
