I was summoned by the Demon King, but I can't understand language.

Somehow, when I woke up in the morning... I found myself in a strange world with a strange girl?! This is definitely Different World Summoning!! It's the Beginning of My Exciting Adventurer Life... I thought But... "I couldn't speak a single word!" The summoner is a cute demon lord (maybe)?! We use gestures because we don't understand each other's language in an isekai communication love comedy!! (Source: Flex Comix, translated)