The phrase "mention about it" is grammatically correct and can be used in written English.
Here is an example sentence: "During the meeting, she made sure to mention about the upcoming project deadline."
And I want to tell you, you know, it's so much about illegal immigration and so much has been mentioned about it and talked about it, and these politicians are all talk, no action.
The fact that Van Gogh's painting represents shoes is the first thing anyone notices about it and it is also (as we have seen) the first thing Heidegger himself mentioned about it: Van Gogh's picture "represents [darstellt] a pair of farmer's shoes" (PLT 19/GA5 3).
Not that this is stated, obviously, but there is shockingly little mentioned about it.
Then she said, "Just don't mention anything about it around here".
Having budgeted the hour or so left before dark for putting up the tent (not to mention arguing about it), I was unsure of what to do next.
He rarely talked about Islandia outside of his family, but to them he would sometimes mention details about it, like commenting that a particular vista struck him as Islandian.
General Musharraf's arrogant assumption of power was all the more embarrassing because the Pakistani foreign minister had just met with top State Department officials and failed to mention anything about it being in the offing.
You bring up the importance of torque in the Introduction, but do not mention anything about it in the Discussion.
Don't worry, 99 percent of places accept all nationalities and won't mention anything about it, so you should go ahead and apply.
Should I start getting boxes?" She was unaware of the eviction holiday, and her eviction notice mentioned nothing about it.
The associate admissions officer who gave the talk he attended at Duke mentioned something about it, and it did sound cool at the time.
