It is against recommendations to include languages other then English in the plugin lang folder. Please remove them.
Good reasons to do so include:
The strings in the plugin folder override the strings in the Moodle language pack.
Because of item 1, the language pack maintainer can't make the translation consistent with the rest of the Moodle language pack in case that is necessary.
No one knows what happens with strings in a child language pack, depending on a strings in a folder, since that is not tested. No idea what es_mx will get: es or es_mx, es from file, es from language pack, ... complicated
You can upload them as a contribution through https://lang.moodle.org/local/amos/stage.php (-> import translated strings from file). Make sure you choose the correct language.
Once the files are there, you can maintain them through AMOS. Just make a contribution, the language pack maintainer will review them and commit them in the Moodle language pack.
HI Plugin maintainer,
It is against recommendations to include languages other then English in the plugin lang folder. Please remove them. Good reasons to do so include:
Background information on https://docs.moodle.org/en/Translating_plugins
You can upload them as a contribution through https://lang.moodle.org/local/amos/stage.php (-> import translated strings from file). Make sure you choose the correct language. Once the files are there, you can maintain them through AMOS. Just make a contribution, the language pack maintainer will review them and commit them in the Moodle language pack.
Thank you for your care.
Kind regards Koen Roggemans Moodle Translation coordinator