Per the USCIS, documents not in English must be translated. The policy states as follows: "All documents that are in a language other than English must be submitted with a translation. The person translating the document must certify that the translation is complete and accurate and that he/she is competent to translate from the foreign language into English."
All translations must include a statement similar to the following:
Certification by Translator:
I typed name , certify that I am fluent (conversant) in the English and
languages, and that the above/attached document is an accurate translation of the
document attached entitled .
Date Typed Name
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NOTE: The above information does not address the specific requirements for any given case and is not a substitute for the advice of an attorney.