This is a huge concern.
The Catechism of the Catholic Church states that immigrants must respect the material heritage of the country.
If they're legal they need to learn English,
if they're illegal(the vast majority of exclusively Spanish speakers in the US) then they're committing a mortal sin by breaking a secular law.
Enabling and pandering to criminals who are in mortal sin, is wrong.
Multiculturalism is liberalism and condemned by the SSPX themselves: http://archives.sspx.org/against_sound_bites/multiculturalism.htm
Having a bilingual mass is the definition of multiculturalism.
There is a Spanish Latin Mass right down the street at St. Catherine of Sienna... Send them there...
This will usher in a demographic shift that will completely replace and displace our current congregation.
The Spanish mass will bring in tons of illegals who will then bring their bilingual anchor babies who will start attending the English mass.
White parishioners will gradually feel uncomfortable and unwelcome in their own parish as the (generally-speaking) Air-Jordan wearing immodest impious ghetto South Phoenix Hispanic crowd moseys their way in because "yo the Latin mass be badass essay!"
Few are willing to voice these concerns, but the vast majority of parishioners will feel this way whether they admit it to themselves or not.
White Flight is a phenomenon for a reason, because people don't want to live around trashy crime-ridden neigborhoods.
This would be essentially equivalent to starting a homeless ministry passing out free food and goodies to homeless who come attend Latin mass.
It's unjust and unfair to significantly permanently impact the demographics of the parish.
Daily reminder: Yes we're required to love everyone, not hate anyone, and have a bond with all Catholics, but that doesn't meant we have to roll out the red carpet to invite the 3rd world into our homes and Churches.
We have a right according to natural law to an identity as a people, and to exclude immigrants who do not conform to our national interests.
It is the conservative right-wing position to limit immigration and SSPX beginning to pander to liberal progressive multiculturalism is deeply troubling.