[Nerindel]

The reason I asked the initial question was that I was pondering the dialect of the Maenwaith in the city, I assumed that they would have some common dialect, like a trading dialect as Pio mentioned above, one which they all would have used during the yearly gathering of the clans?

I was under the impression, perhaps wrongly that the rebel clans only Isolated themselves after one such gathering where Wyrma may have put through her request that the Maenwaith settle into towns and cities giving up their nomadic ways.

As to your concerns regarding Surinen and Narayad would they have known he was Maenwaith from the off set and not Haradwaith who's dialect I would imagine would be entirely different altogether?