Neither Mahe or Lena have started saying something that I say on a regular basis, but just the other day, Anja came out with something that I fear may have come from me. As a rule I don't swear, and I don't like to hear children swear. I may, from time to time, say the odd mild expletive, but nothing worse, fortunately, it would seem.
Just the other day Anja dropped something on the floor and clear as bell said "Oh bugger!" It wasn't just the fact that it was really clear, but it was totally in context. At first I had no idea where she'd got it from, and it wasn't long before she used it again. This time when I dropped something. (I'll admit, I am a little clumsy at the best of times, so it wasn't long before she had the opportunity.) I really didn't think it was me, and then I caught myself saying it once, or twice, and maybe a few more times. Ooops a daisy, that's not good.
It could have been much worse, I've had friends who's little ones have come out with things that they really didn't want them to repeat and at the worst moment. Not that you need to say something often for them to pick it up. They seem to know instantly when you've said something that you don't want them to say, and they repeat it at every available opportunity.
Watch what you say around little children, out of the mouths of babes can come out of all sorts of things that you might not expect.