NO SE PUEDE DECIR: "I WILL CONFIRM YOU"

NO SE PUEDE DECIR: "I WILL CONFIRM YOU"

How many times have you said this? A few at least? Interestingly, it is not that far from the correct version because you can actually say: "I will confirm".

Try to avoid putting the "you" at the end because that converts it into Spanglish and comes from: "te lo confirmaré" or "te confirmo". 

Another alternative, which I prefer, is: "I will let you know" because it sounds a little more friendly and less formal!

​Hope that helps!