UNID language, sounds like an Afro-Caribbean type language, and Spanish (underneath it). I've logged this weird language on 6300 USB a couple times before, and I think this might be a more or less regular thing. Spanish speaking OM at 2219 UTC kept asking the stronger station "what is your name?" "who are you?" types of questions, maybe wondering what he's doing on his frequency.
6300 kHz is a legal HF-SSB marine frequency in the 6 MHz band IIRC. Well, its within the legal band. Now hearing two Spanish speaking OMs on 6300 USB and the stronger unknown language speaking OM has gone quiet, or changed frequencies....nope, he's back. Maybe three QSOs going on at once at this point, the frequency is pretty busy.
Receiver is the Westminster, MD KiwiSDR