High Quality Content by WIKIPEDIA articles! SMS language or textese (also known as txt-speak, txtese, chatspeak, txt, txtspk, txtk, txto, texting language, txt lingo, SMSish, txtslang,or txt talk) is a term for the abbreviations and slang most commonly used due to the necessary brevity of mobile phone text messaging, in particular the widespread SMS (Short Message Service) communication protocol. Some similarities and overlaps in properties and style can be found within SMS language and Internet-based communication such as email and instant messaging.