I love learning and discovering languages so, if you don't mind, please write a sentence in your native language on your postcard (especially if it uses a non-Latin script). Receiving a postcard with something written in a language I don't understand is like a puzzle that I have to solve using the Internet, contacting foreign friends or just learning the basics of that particular language :)
October inspiration: autumn, foliage, harvest, rain, etc.
November inspiration: flags, emblems, symbols, representation
December inspiration: black and white, holidays
January inspiration: tea, coffee, drinks, etc.
February inspiration: wood, metal, elements
March inspiration: spring, flowers, blossoms, birds, fields, melting snow, etc.
Hope you have a nice day!