Proper English - not a guarantee to getting ahead!

So far today, it is 11:56 AM (est), the grammatically incorrect co-worker has said the following two sentences:

1) In a management meeting with all the managers in our building:
"I am done talking, I am not saying nothing more."

2) On the phone with a co-worker in another part of our company:
"He's still not speaking proper is he?"

I ask myself every day why she is the favorite?! Cause certainly, it can't be her English! ;-)

Also as a side note earlier she said to me in the kitchen, that she 'done' her laundry last night.
Wow...