I would think it could be beneficial to be able to streamline the .js file for people (think like jQuery.ui) so if I were developing something not in Japanese,

I would think it could be beneficial to be able to streamline the .js file for people (think like jQuery.ui) so if I were developing something not in Japanese, the additional (and for me, useless) methods would not add to the code size, (assuming that there is not some incredible interweaving between the methods).