I am AMOS maintainer for the mexican Spanish language pack.
1. Native (mexican) Spanish speaker, fluent in English
2. Translated 100% Moodle 3.x core and most additional plugins, making es_mx the largest, most complete language pack besides English .
Also contributed some strings to en_fixes
Also translated recent Moodle HQ YouTube videos.
Also translated several user tours from Moodle.net.
See my Moodle profile.