For questions about situations where certain types of language play an important role, such as slang, informal language or swearing. This tag can also be applied to questions about communicating with people who speak other languages to you.
There are many different variations of any given language. Some people use swearing rather than other minor expletives, some people use acronyms such as "omg" or "wtf" to communicate, and others just use informal words and phrases, such as "gonna". If you don't understand or like another person's choice of language, then this can cause some issues involving communication..
In addition, it can be hard to communicate with locals in foreign countries, especially if their first language isn't the same as yours, or if they don't speak much of your language at all. As a result, it can sometimes be difficult to get their attention or notify them that you speak a different language.