Wizard and Muggle relations

[laurence59 at yahoo.com]

No: HPFGUIDX 29530

Wizards don't do anything with muggles, agreed.
There are more wizard born wizards than muggle born wizards, agreed.
Wizards don't do use a telephone, use muggle money or even know what 
it is, don't know what basketball is, know how to use the tube, etc.

Then why hasn't the wizard language evolved over the years to using 
different words for somthings, as they use very coloquial language 
e.g. wicked.