Adding new languages in the 'Language' drop-down menu

Due to the fact that I cannot add the language Murui Huitoto in the documentary The Lost Children (2024) page, I'd like to suggest the possibility for the user to enter new languages in the 'Language' drop-down menu since the new entry will be analyzed by a moderator like anyway. Hoping that my suggestion will be eventually implemented, I appreciate any feedback on this issue.