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)