Is there any tool I could use to translate game text with just the CIA or 3ds file. Or am I just wasting time.

thanksHacking a rom for translation is a rabbit hole that consumes months to years with a steep learning curve, definitely not a weekend project.
If you still feel like diving in, you could start here: https://www.reddit.com/r/3dshacks/comments/6l30pf/the_ultimate_beginners_3ds_romhacking_guide/
It is a rewarding hobby, though.