Answer:
Yes. Article XXVIII of the Arizona constitution is a violation of Maria-Kelly's freedom of speech as enshrined in the first amendment to the US Constitution.
Explanation:
The first amendment to the constitution guarantees Maria-Kelly freedom of speech. Therefore, to force Maria-Kelly not to speak Spanish to some Spanish-speaking persons with whom she dealt in the course of her work is an abridgment of her right to self-expression. Conclusively, Article XXVIII clearly violated her constitutionally protected free speech rights.