Translations to the LifterLMS Core can be submitted via GlotPress.
Translations to LifterLMS Add-ons and themes can be submitted via translate.lifterlms.com.
If you would like to work with us a translation contributor, please contact us at http://translate.lifterlms.com/become-a-translator/.
If you’re unfamiliar with translation for WordPress you might want to start with the WordPress Translator’s Handbook.
We no longer include translation files in the LifterLMS core and, therefore, do not accept contributions in the form of a completed translation file. If you would like to contribute, please submit translations directly to GlotPress via the above link. Thank you!