Hi!
I saw the note at the bottom of the FAQ that only English Bible references are supported at this time in reftagger but work on Spanish in in progress.
I would like to encourage you to instead of creating a new version for each language to create an internationalize version of reftagger that would allow new languages to be added easily. A new config should be added to allow sites to say for what languages they would like reference tagged in. Also instead of having a default bible version there should be a setting for a default version for each language.
I am from Switzerland where there are four official languages and websites can be in even more languages.