Are you allowed to use the French or Spanish versions of Celestial legal cards in official tournaments here in the U.S.?
Foreign cards in decks
A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
Are you allowed to use the French or Spanish versions of Celestial legal cards in official tournaments here in the U.S.?
Yes, if there is an English printing.
http://rules.l5r.com/CE_Cardinal_rules: "If different printings contradict each other, follow the most recent English-language printing of the card."