Additional Effects and En spells will also apply to jumps but no animation or the chat log will show the effect taking place.
It's noticeable when your weapon has Additional Effect: Stun or any other effect with lasts a short time.
Also, it's easy to test in Ballista or Brenner. Have a DRG/RDM or RDM/DRG cast an en spell. Have a PLD which is in the opposing team use Invincible, have the RDM/DRG or DRG/RDM jump with the en spell active and the PLD will take damage due to the magic damage property of the en spell.
While Spirit Surge is in effect, Jump temporarily weakens an enemy’s defense by 20%. The length of effect is not constant; doesn't stack with Angon.
When Spirit Surge is used, Jump's recast time will be reset to 0:00.