I never knew his native tongue was spanish, but this is from the mouth of the frog himself.

Hola, soy la rana Gustavo. Evan sugirió hace un tiempo, después de muchos tequilas, que ya era hora de hacer una camisa que reflejara la tranquilidad del atrio de mi nueva casa en San Sebastián. Hicimos la camisa con la seda más fina porque a Miss Piggy le encanta usar mis camisas y le dan buen humor. ¡Que la disfrutes!

Just in case your Spanish is not up to scratch and couldn’t be botherered using Google translate.

Hello, I am Kermit the frog. Evan had suggested a while ago, over many tequila's that it was time that he made a shirt that reflected the tranquillity of my atrium in my new house in San Sebastian. We made the shirt from the finest silk because Miss Piggy is prone to wearing my shirts and it gets her in the mood. Enjoy!