Hi Manuel. You can add audio to Rise 360 courses as a standalone block or as part of many different interactive block types (e.g., labeled graphics, process, timeline, etc.). However, it won't be the same narrated experience as your learners are used to in Storyline 360. Since I'm not entirely familiar with your requirements, I would recommend creating a prototype of a lesson in Rise 360 and share it with your learners and project stakeholders to get their reaction before you create an entire course in Rise 360.
Rise 360 courses can be localized as well, to support your Spanish language learners. You can learn more about that in the Rise 360 user guide:
https://community.articulate.com/series/rise-360/articles/rise-360-translate-your-course. I hope this helps!