Evil Men as a future faction in the Edain Mod 4.0 REVEALED!
Jokes apart, it could be. Lake Town (and Dale even more) is said to be a very dynamic commercial emporium, in the middle of various trading routes throughout Middle Earth (almost like Constantinople before and during the whole Middle Age, for example); it is thus very likely to assume that it could have attracted a lot of foreign merchants. We can also assume that they might come from the Human tribes of the South and the East that were not subjected to Sauron (and Tolkien tells us there are many).
By the way, speaking about Lake Town, what do you think about the little 'Flemish touch' that PJ gave to anything referring to this context?
I always had the sense of beholding the typical and iconic misty, cold and marine towns of the Hanseatic League whenever I saw Lake Town
If you can relate