That is not accurate. Any foreign language document submitted to USCIS must be accompanied by an English translation. However, documents submitted or presented for the Consulate interview can be in either English or the official language of the consulate.
Civil Documents (state.gov)
Please note that all documents not written in English, or in the official language of the country from which you are applying, must be accompanied by certified translations. The translation must include a statement signed by the translator stating that:
The translation is accurate, and
The translator is competent to translate.