Would you tell your neighbour if their child was using racial slurs?

[I_run_with_scissors]

if you repeatably heard their child using a racial slur?

my neighbors son is about 13 years old and he, and his friends, refer to another friend as the N word, his friend is black, and his friend is obviously not offended (if any of that makes a difference)

I have asked him myself not to use that language, mostly because i dont think its ok to talk that way, but also because i have younger children who play outside and i dont want them repeating that. But if course it has not made much of a difference