well, his was translated by a legal translator notary in Portugal. Then the school gave us the rest of the documents, and I provided my proof of funds and applied through laos embassy for him and I. I was so nervous myself, but it all worked out easily for us through that embassy
I just did this. Keep in mind too u can't apply for ed visa from Vietnam unless you are resident. Anyway, you can get it translated anywhere and use it. That's what I did for my kid when his bc is in Portuguese. It has a notary stamp from Portugal on it. We took that copy to the embassy in Laos with the rest of the papers and it was fine.