One nation can't learn another nation's sign language, no matter how hard they try.
For example, if Alfred and Matthew are using their shared sign language during a meeting, no one else would be able to translate it. They could literally be planning an attack and no one would know.
But no one understands why this is.
YOU ARE READING
Hetalia Headcanons
FanfictionMostly Canada and America, but don't worry. There will be others too! May result in a One-Shots book. You have been warned.