We use the latest version of Drupal Core (8.7.9), Search API Solr (8.3.7) and Solr 8 to run a simple sandbox project to test and play around.
The current project can be run using a custom configuration or using tour example configuration (recommended).
The Solr 8 example template works fine, but you can add a per-language translation configuration (like Spanish). You can read more about it on the official Language Analysis documentation.
We created a git repository cotnaining a template to run the project. You will find all the required steps and explanations on the README.md document.
To review and test the project, follow this link: