I am impressed and happy that this is happening.
It will be a wake up call to find remedies to the legacy mistrust and prejudice existing between people of greater or lesser degree of indigenous and european background in Guatemala. It may also reflect some of the limitations of the post vat II Roman Catholic Church to successfully evangelize in the context of a colonial society that has had serious flaws since the beginning.
But I am surprised that you mention the western rite. I too feel certain that the Novus Ordo as it practiced there currently will not last once Orthodoxy takes root.
As far as the charismatic background of Latin/Western rite in Orthodox Church, whether this is true remains to be seen.
At the present time there is apparently a VERY large contigent of anglo-catholics waiting to enter ROCOR's WR which may overnight change that situation to become more complex than described by my esteemed and dear friend "Mexican".
Ironically, ROCOR has recently put a spanish language version of it's mass on their website.
I would bet money that eventually, within a decade, a western rite mission will come to exist in Guatemala.
There's too many people familiar with it who live there for it to be entirely ignored.
It is unquestionable that the Latin rite can be a powerful force within the Orthodox Church when it comes to evangelization.
It was Gregorian chant that lays claim to first orthodox form of chant to be adapted into native american language. Perhaps the Iroquois language Gradual for the Mass made by french missionaries in Canada can serve as an example and inspiration to do the same with the "Quichean–Mamean" language of the highlands of Guatemala by Orthodox missionaries?
Perhaps my expertise in making Quetzaltenango style "Christmas" tamales will eventually find greater appreciation.
You can give it a try if you ever have the time, it might come in handy. My recipe has a few secret ingredients not found there but is very close to the above link.
What an interesting time to be alive!