Australia Citizenship Test

So the Australian Goverment wants to implement a law in which to gain Australian citizenship you have to be able to speak English. By 2020 it is predicted that around 1 million Australians won’t be able to speak well enough English to have a conversation. What’s interesting is that Australia has no official language however the main language is English. If the official language isn’t English then should the government force everyone to know it? What are your opinions on this change in the law?