Based on the possibilities I was able to see in the videos going through Riku, I was able to understand the endless (and huge) utilities of experimenting with Riku, and that's why I decided to get the lifetime deal. But, unfortunately, GPT-J does not have models in Spanish, and to be able to use it in this language with a consistent model it is only possible to do it using Muse (proprietary), so it is no longer useful for my purposes. I'll be evaluating a few more days before deciding if it's the tool for me or I should think of another. However, I must mention Stuart's willingness to respond to my queries on this matter.