Como norma nos vamos a imponer hablar inglés a cada instante
 

Any help to translate into english?

As a rule, English will now be spoken at all times.

can you use habit instead of rule ? make a habit or sth like that

Yes, you can, but it changes the meaning. If you use habit instead of rule, it's a lot less forceful.

Make a habit of speaking English at all times.

Besides, the subject of the post was:

http://forums.tomisimo.org/images/icons/icon2.gif Como norma nos vamos a imponer hablar inglés a cada instante

And norma means rule in English and not habit, right? :)

It depends, norma in Spanish sometimes is a habit instead of a rule. Thanks

It is used like that sometimes in Spanish, but actually it means rule in Spanish, according to RAE.