Oh come on no it isn't. Language continously evolves, if we could go back to the 1500s 1600s you would not even understand the English they spoke back then.
Also most of the words in English and European languages have originated from the very old Sanskrit language of India, 5000 bc, many words in Indian languages are exactly the same as English and have the same meaning, other words are the same but the meanings have changed.
I can even give you a breakdown of what English words mean how they came about
E.g
Indian word 'Jull ' means to burn
Indian word 'Jullus' = jealous
Indian word 'jullsee' = jealousy
So the 'jeal' means burning inside
Indian word 'cahricrum' = curriculum
Cahri means work
Crum means list order or program
Indian word 'pass' means beside
but the meaning has slightly changed in the English language.
Indian word 'under' means inside
but the meaning has changed in the English language
There are countless examples
of identical words or very similar words.
As one poster correctly said
some words went to America but stopped being used here.
E.g. New Jersey Turnpike is a road But the word Turnpike is no longer used here.
I think Americanisms have become more common here because of the Internet where we are reading a lot and communicating. With American TV before the Internet we were just watching but not communicating.
Some Americanisms I have noticed that we never used to say but I hear on the radio now or in public are:
It's a no Brainer
They have drank the kool aid
How are you ? ' I'm good '
We always used to say fine thanks or not too bad
Hi and low for temperature of the day which I think is much easier to understand.
Our school years copied their grade years which I think is better
Where are you at ?
Instead of where abouts are you ?
I really like this Americanism and you see it on invoices packing lists in the UK but it still hasn't caught on. Its using the # symbol instead of the word Number or No.
So what's your phone # ?
What is the tracking # ?
Etc
It's so much better
Odd Americanisms
Write me. Instead of write to me
(H)erb - I never got that one