They wake by 6:30am to make the bus for school. 8:30pm = 10 hours. Sleep is huge for kids, but they will be out of the house in 5-6 years and have to learn to manage their own schedule. Did we hold to that bedtime a little too long? Maybe, but it's what worked for us as a family.
I already covered the potty mouth in my original post, but to elaborate...in my experience adults spend their adulthood pretending they don't cuss by not saying foul things in front of kids and kids spend their childhood the same way in front of adults. I have been in boardrooms with executives dropping F bombs every other word. I went to a Catholic HS and the Priests/Brothers would cuss. My experience is that the vast majority of people use foul language (myself included). Also, don't get me started on the words/phrases I heard when playing football. I have also found the more I correct him the more he does it, the less I react the less he does it. In this case he was trying to be funny. The bigger teaching moment in this scenario was about responsibility and managing their time better.
Also, for context both my kids are in AP/Honors classes, have straight A's and play sports year round. My wife and I receive nothing but praise from coaches and school staff regarding our kids behavior. I am just not going to get hung up on a few foul words here and there.