How can beers and lagers be called by their national names when brewed in another country?

ABOUT 16 YEARS AGO I WORKED FOR WHITBREADS IN BERKSHIRE AND THAT COMPANY BREWED ALL SORTS OF BEERS AND LAGERS AS WELL AS GUINNESS UNDER LICENCE FROM THE COMPANY'S IN THEIR OWN COUNTRY AS FAR AS BUD GOES THERE IS TWO COMPANY'S USING THIS NAME ONE IS IN THE CHECK REPUBLIC AND THE OTHER IS IN AMERICA AND THAT WAS FORMED BY IMMIGRANTS FROM CHECOSLOVACIA and quite legally too so you have two company's bearing the same name and none are fakes so all sorts of beers lagers and stouts are indeed brewed in this country and all are brewed under licence look at the cans /bottlee and it is legal for the brewery's to do this it is whats called a Commercial enterprise but then who is to say that it tastes as good as in the country of origin it is ok having the recipe and it may taste similar but a lot of factors go into making beers such as the local water but never mind i am sure that the fosters i am going to drink tonight will indeed taste quite nice irrespective as to where it was made as far as tasteing different theres so many factors that make beers lagers and stouts taste different all though they us the same basic ingrediens this is so simple to explain such as the malts that are used simple some roast it for a longer period some not so long and the hops theres so many different ones and then the yeast quite a few different ones theres so many combinations and that is why we have such a large amount of different types of beers lager and stout