Is ‘disorientated’ a word? Ask someone from the USA, and they are likely to say no. But it’s absolutely correct in British English.
Languages change constantly and English is no exception. That causes confusion sometimes, and not just if you’re learning English as a foreign language. The variations of English which have developed in the USA, Canada and Australia have been around for some time. But other world regions have also developed their own brand of English. There are regional variations of English within the UK itself. Singlish, Hinglish, Chinglish and others are all becoming more commonly heard. When two non-native speakers communicate in English, they are likely to use a kind of ‘International’ or ‘Global’ English.
English is sometimes described as ‘the world’s second language’, and the ability of people in many different parts of the world to communicate using (International) English undoubtedly helps global trade and communications. And as global interaction increases, so does the use of English as lingua franca.