Does your character have any prior knowledge?
he's seen Amestrian military sign once or twice, but doesn't know any of it. He does have knowledge of morse code, however!

Would you like to have your character learn or teach?
t e a c h h i m, and I guess if anyone wants to learn morse he can be the most impatient teacher ever (what do you MEAN people need more than a few days studying to memorize an alphabet???)