Hey there, fede! Thanks for getting in touch. 🙂
Good questions. First off, only the support you receive and the ability to update the plugin is affected by the one-year license. In other words, the plugin will still continue to function even you choose not to renew your license at the end of one year.
We try to keep the plugin compatible with as many languages as possible, but rely on the community to help us make that happen. That said, the Spanish translation files are pretty solid, but there may be a spot here and there that need to be updated. In those cases, you can updated the translation files yourself, or reach out to the Translations community for assistance.
Does this help answer your questions? Please let me know and thanks again for checking out the plugin. 🙂
Geoff