Ey Mrs. Curie! Thanks for your mention! We are doing our best to encourage not only new authors into steemit, but also and more importantly spanish native-speakers who were (even successfully) only writting in english, to do it also in spanish.
The higher rewards are definitely attracting more and more content every day.
By the way, we also encourage non spanish natives to write in spanish - we will also do our best to help you correct and improve your articles.