Does Danbooru have tags for Jet Force Gemini? Because I just made some and I'm not sure if I should go by the English name or the Japanese name for the game.

Meso'ed said:
and I'm not sure if I should go by the English name or the Japanese name for the game.

The release dates of
Jet Force Gemini (NA): November 2, 1999
Star Twins (JP): December 1, 1999

I think, jet_force_gemini and juno_(jet_force_gemini) are better.