He has now learned English well enough that he can conduct interviews without an 'interpreter'.
He gave his statement 'through an interpreter'. [=an interpreter translated his statement]
(..) If anyone is receiving this... Please... Well, I mean... There are a lot of ways you can interpret what he said. I don't need an interpreter to know what this means. Russia just executed one of their own experts to keep their secret. "Many become one" could just be their way of saying, (..)2016 Arrival