Taglish or Englog is code-switching and/or code-mixing in the use of Tagalog and English, the most common languages of the Philippines. The words Taglish and Englog are portmanteaux of the words Tagalog and English. The earliest use of the word Taglish dates back to 1973, while the less common form Tanglish is recorded from 1999. Taglish is widely used in the Philippines, but is also used by Filipinos in overseas communities. It also has several variants, including coño English, jejenese and swardspeak. Taglish is very widespread in the Philippines and has become the de facto lingua franca among the urbanized and/or educated middle class. It is largely considered the "normal acceptable conversation style of speaking and writing" in informal settings. It is so widespread that a non-native speaker can be identified easily because they predominantly speak Tagalog, whereas a native speaker would switch freely with English. According to the linguist Maria Lourdes S. Bautista, there are two contrasting types of code-switching in the Philippines: deficiency-driven and proficiency-driven. Deficiency-driven code-switching occurs when those who are not competent in one language must thus switch back to the language that is more familiar. That is common among younger children, as in the example below given by Bautista: Proficiency-driven code-switching, on the other hand, occurs when a person is fully competent in both languages being used and can switch between them easily. That is the main type of code-switching in the islands. This example is given by Bautista, taken from an interview with the television journalist Jessica Soho: Proficiency-driven code-switching is characterized by frequent switching of the Matrix Language (ML) between Tagalog and English, demonstrating the high proficiency of the speakers in both languages. There are also a wide range of strategies involved, including: the formation of bilingual verbs by the addition of prefixes, suffixes, and infixes (e.g.