Hey there
You can find the needed translation file for the plugin on GitHub (user-feedback.pot in the languages folder). This can be used to translate the plugin into Spanish using a tool like PoEdit or the Loco Translate WordPress plugin.
We’d love to include a Spanish translation in the plugin. You can just send us a pull request on GitHub with the newly created files (here’s a how-to on pull requests).
In the future users will hopefully be able to translate plugins directly here on WordPress.org!
Note: There will probably be quite a few string changes in the future as we’re further optimizing the plugin.
