Well Selie're will be speaking decent west common. After all she was chosen to go to Navire so it only makes sense she has the closest language skills possible from her race. With that said, the majority of her people would speek in an unique dialect caused by the 200+ years of isolation. So conversing with them without knowing the dialect would be like trying to use english to speak to someone only knowing french. There are some similarities, but otherwise it's pretty much not possible.