The French decision should have no immediate legal impact outside of the EU.  If there are legal challenges in other places, the outcomes will vary according to the specific laws of those jurisdictions.  The issues will be considered de novo in those jurisdictions.

Mark posted a while ago that MtGox was in contact with various financial regulators in Japan.  I don't think he's updated how that's progressing lately but it can take a long time to get decisions about things which don't fit neatly into predefined boxes from regulators.