r, ever wants to close this site because it has too much member and caused some criminal on world. According to Wikipedia (2011: 17th of July), “Facebook has met with controversies. It has been blocked intermittently in several countries including the People's Republic of China, Vietnam, Iran, Uzbekistan, Pakistan, Syria, and Bangladesh on different bases.” But beside there is a negative effect of facebook, there is sure also a positive effect of facebook, one of them is connecting people over the world.
The students of English department who learn English deeply are also exist on facebook. They learn English on their daily lecture day, so they surely may influenced by English on their own conversation. There are so much statuses, notes or comments on facebook containing English written by the students of English Department. They often switch their Bahasa Indonesia into English. This kind of situation may be called as code switching.
Language switching can actually happen only in the language of a bilingual. Bilingualism is the term for speaking one or more languages (Scotton, 2006: 2). In line with that explanation, the students of English Department can be considered as bilingual because they should have ability to speak English since they entered the department. The language situation in Indonesia is considered higher than the local languages and English is considered higher in prestige and social status than Bahasa Indonesia (Syafi’ie, 1981: 40). Therefore, English Department Students are likely to do code switching in their communication with others.
“Subahanallah...... yang namanya orang tua mah always pray for all of you. We hope all of you be success. That's way, belajarlah seriously.” That is the example of code switcing written by a student of English Department on facebook comments. We can find other much example of sentence like that doing by them because they as bilungual students have their own way to communicate with each other. We can defined it to the rare phenomenon. By switching the language like they do, some people may not understand what they are talking about. Some may be know that its including to linguistics phenomenon. Some may be understand about code switcing, code mixing, interference, and many other. But, the general people even the students of English Departmen may do not know how to different between Code Mixing, Code Switcing and interference. According to Chaer on his book Sosiolinguistik Perkenalan Awal (2004: 114), “Pembicaraan mengenai alih kode biasanya diikuti dengan pembicaraan mengenai campur kode. Kedua peristiwa yang lazim terjadi di masyarakat bilingual ini mempunyai kesamaan yang besar, sehingga seringkali sukar dibedakan.”
The similiarity of code switching and code mixing is on the using of two languages or more. But clearly, we can diferent it by looking the context. According to Wardhaugh (2006: 103), “Code mixing occurs when conversant use both of languages together to the extent that they change from one language to the other in the course of single utterance.” It can be said that the languages that used on code switcing phenomenon still have each own autonomy function, doing by consciously with certain factors. While on code mixing, there is main code that has its own autonomy and function, while the other code just a piece without a function. While the different of code switching and interference lays in its reference. Code switching refers to the use of other language beside our mother language on communicating, and interference refers to the deviation of using another language on communicating as a fault. Still according to Chaer (2004: 124), “Interference adalah perubahan system suatu bahasa sehubungan dengan adanya persentuhan bahasa tersebut dengan unsure-unsur bahasa lain yang dilakukan oleh penutur yang bilingual.” In this research, it will be investigated more deeply about the phenomenon of code switching getting loose from the other phenomenon such as code mixing and interference. Someone may have the reason why they switch their mother language to the other la