Games : I got a pokemon through trade but its in another language

I've been playing Pokemon for a very long time and I got a level 100 pokemon from a trade and its level 100 last year. I know I cant evolve it but I'm really tired of it's name being in Japanese. I've tried for a while to ignore it but it's really getting annoying. I have no idea who traded it to me so I cant ask them to trade back or anything. I do love this pokemon but I dislike how I cant see its name in english. At the moment, I cannot trade it with anyone for the exact pokemon because of WiFi problems nor would I anyway. Its a level 100 Quilava for Pokemon X. Does anyone know what I can do?