The language (localization) for meetings are handled on the server side.
Here is a BMLT server that is localized in French.
https://nameetinglist.org/quebec-region-outaouais-area/?current-meeting-list=1
I heard rumors that Chris (author of the BMLT server) may be looking at a spanish localization.
He can be contacted here.
http://bmlt.magshare.net/contact-us/