Every day I receive questions about what the difference is between certain words and ways of speaking and which would be best. The answer is almost always the same!! IT DEPENDS!!! It depends on the context, the environment, the situation, whom you talk to, where you are, who you are, etc. On top of all this, we have variations in every language and even if we don't speak the same variations, we can still understand each other! Do you know how in Brazil, from region to region we call the same object a traffic light, stoplight; traffic control? Even if you speak to someone who uses a different word, communication still occurs. And even if there is a misunderstanding, it is always possible to clarify doubts with some basic questions such as "What means...?" or "Can you repeat that, please?", among others... In any case, it is also always possible to research the variations in specific regions, specific groups, etc.! Linguistic variations such as accents, vocabularies, cadence, even grammatical differences exist in any language. In addition to these, there are also variations in gender, generation, social class, geography, and even area of knowledge. The ideal is to master a few different variations to have a flexible language for different types of situations, and in case of any unexpected misunderstanding, just take a deep breath and try again.