you can load jsons into an array natively, but you need to have them formated in the way construct wants them
here is an example:
{"c2array":true,"size":[4,2,5],"data":[[["Hund","dog","chien","?","??????"],["Haus","house","maison","?","???"]],[["Katze","cat","chat","?","?????"],["Auto","car","voiture","?","??????????"]],[["Maus","mouse","souris","???","????"],["Stra?e","street","route","??","??????"]],[[0,0,0,0,0],[0,0,0,0,0]]]}