Why can't the English learn to speak?

We will work this film in class. Here is the first excerpt of this film

The musical film My Fair Lady is based on the famous play Pygmalion, by George Bernard Shaw. It is about professor Henry Higgins, a misogynistic and arrogant phonetics teacher who will try to turn the Cockney accent of the flower girl Eliza Doolittle into a proper English one, so that she can be presentable in high society. He  will succeed, but their lives will not be the same again.



  

Look at her, a prisoner of the gutters
Condemned by every syllable she utters
By right she should be taken out and hung

For the cold-blooded murder

of the English tongue

Heavens, what a sound!
This is what the British population
Calls an elementary education

Come, sir, I think you've picked
a poor example.

Did l?
Hear them down in Soho Square
Dropping H's everywhere
Speaking English any way they like
Hey, you, sir, did you go to school?
                 
What ya tike me for, a fool?
                  
No one taught him 'take' instead of 'tike'                   
Hear a Yorkshireman, or worse
Hear a Cornishman converse                  
l'd rather hear a choir singing flat
Chickens cackling in a barn
Just like this one
                  
Garn!

Garn!
I ask you, sir, what sort of word is that?
It's 'aoow' and 'garn'
that keep her in her place
Not her wretched clothes and dirty face
Why can't the English
teach their children how to speak?
This verbal class distinction
by now should be antique
If you spoke as she does, sir,
instead of the way you do
Why, you might be selling flowers, too

I beg your pardon.
An Englishman's way of speaking
absolutely classifies him
The moment he talks he makes
some other Englishman despise him
One common language
I'm afraid we'll never get       
Oh, why can't the English learn to...
... set a good example to people
whose English is painful to your ears
The Scotch and the Irish
leave you close to tears
There even are places
where English completely disappears           
Why, in America
they haven't used it for years!
Why can't the English
teach their children how to speak?
Norwegians learn Norwegian,
the Greeks are taught their Greek
In France every Frenchman
knows his language from 'A' to 'Z'
The French don't care
what they do actually
As long as they pronounce it properly
Arabians learn Arabian
with the speed of summer lightning
The Hebrews learn it backwards
which is absolutely frightening
Use proper English,
you're regarded as a freak
Oh, why can't the English
Why can't the English learn to speak?