When a Malay speaks to a Malay, he will speak in Malay. When a Chinese speaks to a Chinese, he will speak in Chinese. But when a Chinese speaks to a Malay, what language will be used?
In Malaysia, the national language is Bahasa Malaysia, which is actually Malay which has been "Malaysianised". Bahasa Malaysia is widely used in most Government offices throughout the nation. But in the private sector, English still prevails, both in the spoken and written sense.
However, sometimes it is difficult to use solely English when speaking to some people because they're simply unable to speak the language. So there will be times when Malay is used instead. But not everybody is well versed in Malay too, so some people have no choice but to speak a mixture of English and Malay.
In my office recently:
Chicken: "Bikin dua copy" (Make two copies).
Holding a piece of document and speaking to the office girl.
And then a little while later, the duck comes back with two cups of coffee.
To those who still don't know it, COFFEE is KOPI in Malay.