Yes, and so is every other country! All have their different languages, cultures, histories and laws. No-one joins the EU in order to lose their identity. The EU contains no majority language group or culture; we’re all minorities. In fact, the EU’s motto is ‘United in Diversity’. Evidence
It was Margaret Thatcher who said that being in Europe hadn’t made the French any less French, and on this she was right — being in Europe hasn’t made us any less British either!