Hi @juanjogallery ! My opinion is to have one account. I have seen amazing creators create the exact same content in two different languages while posting from one account.
That's because I believe most users on Pinterest are searching in English. Therefore, that is a strategy to appeal to a larger audience. However, so many people get excited to see Spanish content, too. If you post from 1 account, you are more likely to capture both audiences for higher impressions (more eyes will then be on your products)!
Please let me know if this makes sense and best wishes!