Thread:Tacoman999/@comment-25205238-20171001205814/@comment-27794543-20171002041842

As shown throughout the series, many Grounders speak English. The note only proves that at least one of the slaves knows English (e.g. Riley). We see the girl delivering the message but we never see her writing it. Thus any of the slaves (e.g. Riley) could have written it.

Yeah, Miller said "our people" – referring to people living in Arkadia, NOT the slaves. Bryan responds, "Not all of our people. What about Riley?" So of all the slaves, Bryan only indicated that Riley is a Sky Person. As I've stated above, Bellamy said that "we'll take them to their villages in the morning". This was after they arrived in Arkadia, proving that these people aren't Sky People.