Language means troubles, any language you can imagine involves coding and decoding of information, that means interpretation sets are required to achieve coding and decoding of the language and that means that there is a lot of free room for mistakes which, in turn, is leading to communication issues and misunderstandings.
As quicker coding and decoding is happening as more free room there is for miss-interpretation.
Choose what words you use wisely, take your time to build you phrases and then only speak.
Make sure you know what you are talking about at all times.
Swearing and slang are one of the biggest mistakes you can do in your life and are leaving huge areas for miss-interpretation. They also are placing you and your life closer to the people who apply the same language.
Think about it, do you really want to be in there? Probably not..
The language you speak very often decides about the fact who stays around/follows you in your life.