Hello Freddy, interesting piece! The blade is clearly Songye and the handle is clearly Yaka, so is this a different Yaka sword, or a different Songye sword????

The two tribes are also quite distant! maybe is easier and believable that a good blade treveled than an handle. Again very nteresting
Edit: I noted also that the handle shape near the blade is different from an "usual" yaka handle with yaka blade, so the hanlde was shaped to fit the blade so maybe the blade arrived in a yaka village and there was "dressed". Unfortunatly ther is no scabbard. So I think that you are right Freddy, a different yaka sword