You can ask Siri to translate English into another language.
Simply say “Translate” before the phrase or word you want Siri to translate and end the sentence with a language, e.g. “to French.” Similar phrasings work, too – try asking “how do you say X in Spanish,” for example.
Siri will respond out loud with the translation. Unfortunately, it can’t translate back into English.
Compatible languages include Mandarin, French, German, Italian, and Spanish.