"Traduce" means "translate" in Spanish.
Therefore, "traduce Jajaja" means "translate Jajaja," which doesn't make much sense because "Jajaja" is already a universally understood expression of laughter.
You probably meant to ask:
* What does "Jajaja" mean in English? The answer is "haha" or "lol."
* What is the translation of "Jajaja" into English? The answer is "haha" or "lol."
Let me know if you had something else in mind!