Kagetanehiruko
Honestly I'm unsure how he expected to convince people he is from essos when he knows nothing about it and they have had a proper education. I'm fairly sure that all knights would be recorded too to stop people just pretending to be knights. Who knighted you, where you were knighted, what you were knighted for, your banner (coat of arms). Not answering those questions would probably lead to being arrested for impersonating a knight. Luckily he is strong so can just ask for trial by combat (except from aerys).
You know, for as much as the author is butchering grammar, I gotta hand it to them. They have a story they want to tell and they're getting it out there regardless of skill. Not everyone would/could do that for whatever reason. Also, be sure to note I said 'skill' not 'talent'. For regardless of how ....'difficult' it is to read some parts of the story, it's at least interesting enough to keep putting up with those 'difficulties'.