It is my hypothesis that because of the prevalence of Brazilian speaking users in comparison to Portuguese speaking users and the fact that native portuguese is very dificult to be understood by many brazilians … I think it is entirely possible that clips as being rejected simply because of this. I wanted to see if this was in fact occuring…
but without having access to the invalid clips audio I have no way of knowing the if the portuguese accent is in fact the reason from clips are flagged as invalid
for more information on this discussion you can see this other thread: