Translating WPLMS EventOn is pretty much like translating any other WPLMS plugin.
Refer this tutorial for detailed tutorial : https://wplms.io/support/knowledge-base/translate-using-codestyling-localization-plugin/
Step 0 : Install Codestyling and Codestyling preserver plugin.
Step 1 : Go to WP Admin – Tools – Localisation – Locate WPLMS EventOn – Add New Language or Edit existing language file. You may need to re-scan the files again.
Step 3: Locate the terms to be translated and click on edit.
Step 4 : Add the translation and click on generate mo file
Step 5 : Translations have been applied.