The picture shows a Turkish Airlines airplane with a special livery that features a large "TÜRKIYE" inscription on the side of the fuselage, which is usually not seen on regular Turkish Airlines planes. The joke here is that the plane is apparently too proud of its nationality and has decided to "wear its heart on its sleeve" (or, in this case, on its fuselage). The Turkish joke would be: "Bu uçak çok milliyetçi olmuş, 'TÜRKIYE' yazısını direkt gövdeye yazdırmış!" This translates to: "This airplane has become too nationalistic, it has had the inscription 'TÜRKIYE' directly written on its fuselage!" The joke plays on the idea of an airplane being "nationalistic," which is humorous because airplanes are inanimate objects and don't have feelings or opinions. It also highlights the exaggerated display of nationality with the large inscription.