Sadly; proper language and speaking, as well as writing, are falling fast.
Many like to say that it is evolving but the truth is that very few schools are putting enough weight in English.
They say it is PC to allow poor children to speak poorly without being called on it because being corrected might hurt their self esteem.
The truth is that letting them do it is hurting their future. You may get away with bad grammar and poor speaking habits growing up, but you will be measured by them later on.
I suggest correcting your poor grammar rather than waiting to see of it catches on.