T10 Visa application process (Bogotá)

Hi Everyone! Im currently in the process of applying for my T10 visa and I wanted to ask for help/advice from anyone who has already gone through this. I am paying to have my birth certificate apostilled in the USA and then have my family send it to me. As of proof that I am single, Im planning on using this year's tax return which states that I am single (since we dont have that form in the USA). When any of you went through this, did they require everything to be translated into Spanish? If so, can anyone recommend me a good translator in Bogota? Is this something my boyfriend and I could do or does it have to have some sort of official stamp?

Any other advice on the process / the part where they want "proof" we have been living together / or notaries that are nice to deal with would be so appreciated!

Thank you!