Article VII - Elective Franchise, Section 3 (Religious and racial equality protected: restrictions on amendments):
The right of any citizen of the state to vote, hold office or sit upon juries, shall never be restricted, abridged or impaired on account of religion, race, language or color, or inability to speak read or write the English or Spanish languages except as may be otherwise provided in this constitution.
I sat upon a jury where a prospective juror was questioned in Spanish with a translator provided by the court. That person was not selected as it have required a translator present during deliberations - doable but a distraction to say the least.
On the other hand, I would have had BIG problems with the decision if the story had read:
NM Court Rules Non-English Speaking NON-Citizens Can Serve On Juries
p.s. I have BIG problems with the fact that NM allows Non-English speaking NON-citizens to receive driver's licenses and the state legislature has rejected all attempts to repeal the Richardson-era law.