If you mean the difference between street English, and Proper English, then the differences are vast.
I was taught what Americans call "Oxford English". I learned the language of my new home from a teacher who was, indeed from England. I developed the speech patterns, and even the accent from her. I consider the English I was taught to be proper, or "smart" English. I don't use colloquialisms (slang) when I speak in a formal situation, and I don't say things like "ain't, or y'all" (Even though I am currently living in Texas). Study your own grammar, and learn proper speech and see where the difference is for you.
what differnce between the old and the modern english
there is no difference. It is called American english, also known as dumb english.
the difference is scotland stinks
wht is the basic difference between English language with urdu language
French
Is there difference between smart and intelligent?
what is the difference between a credit card, debit card and smart card
What is the diffrence between smart card and other cards?
There is no difference I know this because I am smart
born smart is were you are born smart is where its where you are smart since the day you were born but get smart is were you go to school and learn the hard way
formal is smart informal isn't smart
Smart cars are uglier, but better for our environment.
There are no difference between them they are the same thing.
Smart valves produce gas faster
i dont no sorry i am too smart
Yes they do , the only difference is they look smart and they speak pleasant.
what differnce between the old and the modern english