Vezuha, you should always bring all your original documents to the interview and submit a copy of these originals in your AOS package even though they are not in English. What you should include in your AOS package is a translated copy (in English) of the original document, a copy of the original document itself, and a certification by translator which attest to the legality of the translation. I have my birth certificate, and high school diploma in French, and I plan on submitting a copy of those originals, the translated ones, and certification by translator.
And I think the interview letter of Onebowloflaska specifically asked him to bring all his original documents.