Hmm… aside from balance issues and the fact a spear usually requires 2 hands… maybe if the guy only exercised one arm a lot doing something and that was the arm tha wielded the spear, could work.
Dual wielding spears was debunked as pointlessly excessive and makes it much harder to attack/defend. A sword may work but it would have to be used more like a shield to deflect attacks. A rapier or cutlass could work but it would have to be used very specifically.
The spear would be the attacking wrapping while the sword would have to be a one handed defense/deflect weapon. A smaller sword breaker could also work but it would depend on who you were fighting.