[{"role": "user", "content": "I'm writing a letter to a friend in Italy and I want to express that some people are acting childish, how would I translate 'They're immature' into Italian?"}, {"role": "assistant", "content": "The translation of 'They're immature' in Italian is 'Sono immature.' You can use this phrase to convey that some people are acting in a childish or immature manner."}]