It is a fact that English is being accepted as an international language.

1.这个句子是主语从句.It是形式主语,that English is being accepted as an international language这个从句才是真正的主语.2.没有强调句.不要被It is...that...所迷惑,这里并不是强调句.判断的准则之一就是,当句子...fact是可以跟同位语的，我就是搞不清究竟是同位语从句还是主语从句fact确实可以跟同位语从句。注意一下冠词a，另外举一个例子：We all know the fact that English is being accepted as an international language.这里就是典型的同位语从句了。