NET
6 When this sound occurred, a crowd gathered and was in confusion, because each one heard them speaking in his own language.
Darby
6 But the rumour of this having spread, the multitude came together and were confounded, because each one heard them speaking in his own dialect.
KJV
6 Now when this was noised abroad, the multitude came together, and were confounded, because that every man heard them speak in his own language.