If there is one thing we can be certain of about society is that it will always be influenced by outside factors. A single outsider can influence the whole community and bring small changes to their way of life. Now imagine all the interactions humans have had throughout history and the kind of impact they must have left behind. This is why none of our cultures and customs remain the same for a long period of time. This system of change is evident in every aspect of life. People affect each other on an individual level too. But when a society gets influenced by something, the change is more prominent.
If you are a non-native English speaker, then you would have plenty of words in your vocabulary that wouldn’t make sense to a native speaker of the tongue. The reason behind that could be that you are bilingual, and both of the languages you speak influence each other. This is why there are many versions of the English language today. The world continues to evolve, and as a result, languages and cultures keep on changing in different ways.