The main aim behind the use of broken language is to help someone understand what you are trying to convey in the easiest way possible rather than blankly stare at the person and expect him to read your mind.

And i personally don't find anything wrong in making your 'own version' of a language, provided it is being easily understood by others.

It does not indicate adulteration of the language,as long as a person fluent in it (or a native speaker), knows as to what's wrong and what's right.
And if it is felt that the native speakers of the language adopt those wrong words like slangs etc in their usual vocabulary only then should it arouse concern.
This should be addressed through education and not by enforcing laws,where people are being derived of their freedom of learning a new language (The official language of the country they are residing in).

There are so many people who have thrived in the country, only because they found new ways of communicating with people, and using broken language is one of them.