Using AMOS tool for language pack translation
Traduccion al castellano del pluggin tutorialbooking
yes, but they are generic forums of moodle, not of masters (translations)
You can write about the Moodle translations into Spanish, both international Spanish and Mexican Spanish, in the forum for Traducción Moodle al español.
You can also send Moodle messages to the maintainers for the International Spanish language pack.