See Module:Lingua Libre record and PHP/JS rw.Record.js#L125-L137.
Our Category:Lingua Libre pronunciation by user is actually on a by wikimedia account system.
Only Wikilucas has sorted, by hand, its files to account for the real speakers. Which is the practice we should have.
text ├─ Category:Lingua Libre pronunciation by user (465 subcategories) ---> actually by account | └─ Category:Lingua Libre pronunciation by WikiLucas00 (4 subcategories, 0 files) | ├─ Category:Lingua Libre pronunciation by Anniina (WikiLucas00) (10 F) | ├─ Category:Lingua Libre pronunciation by Helena (WikiLucas00) (10 F) | ├─ Category:Lingua Libre pronunciation by Renaud (WikiLucas00) (146 F) | └─ Category:Lingua Libre pronunciation by Samuel Waina (WikiLucas00) (54 F) ├─ Category:Lingua Libre pronunciation by Yug (369 F) ---> by various speakers
Example of hand edit: https://commons.wikimedia.org/w/index.php?title=File%3ALL-Q1412_%28fin%29-Anniina_%28WikiLucas00%29-paha.wav&type=revision&diff=592183306&oldid=581565257
Good first task: This ticket is a good first task, since it mostly require to dive, inspect codes and categorisation, and push the issue forward. It's observation, hacking of LUA and discussion. Give yourself some time to succeed.