Google sometimes is very irritating, because they check your IP
address to find out which country you are from and will
automatically re-direct you to the local version of it.
Sometimes, there's a mistake in checking and you end up with a
wrong version of Google.
One way to avoid, is to type the URL directly: www.google.com.sg
for Google Singapore or www.google.com/ncr for the main version of
Google.
It should be using the English version, unless you have other
languages installed which might cause problems with it. Change your
language settings to solve this problem if that's the case.
