Learn abbreviations and sayings

Every country has its own sayings, so you'll need to make investigations about the most common phrases and sayings of the country. You're going to need to know too, the abbreviations they used to use, in case you have a conversation with a native person you can understand what they say even if they abbreviate words. Start talking the same way they do, start using the most common abbreviations and sayings and you'll get used to them and this will make your language be better and extended.