Here's how you could respond, depending on the languages spoken:
If you speak one language:
* Español: "Se habla español en casa." (Spanish is spoken at home.)
* Inglés: "We speak English at home."
* Francés: "On parle français à la maison."
If you speak multiple languages:
* Español: "Se habla español e inglés en casa." (Spanish and English are spoken at home.)
* Inglés: "We speak English and [other language] at home."
* Francés: "On parle français et [autre langue] à la maison."
If you speak more than two languages:
* Español: "Se hablan varios idiomas en casa, como español, inglés y [otros idiomas]." (Several languages are spoken at home, such as Spanish, English and [other languages].)
* Inglés: "We speak several languages at home, including English, Spanish and [other languages]."
* Francés: "On parle plusieurs langues à la maison, comme le français, l'anglais et [autres langues]."
Remember to replace the bracketed information with the specific languages you speak!