I totally agree. I wanted to learn Spanish, and my background is English. My motivation is that I didn't want people talking about me behind my back, but in front of my face, in a different language.
But my friend does not have the same motivations I did. She is at her job, a school in Texas, where the teachers' tests are in English, the students take their exam in English, the textbooks are in English, the forms they fill out are done in English, their gradebooks are in English, and she's cool with all that - because she speaks English.
The principal, on the other hand, mixes his English and Spanish, making a sort of Spanglish. He gives job-vital instructions in Spanglish, and she doesn't understand it. Nor should she have to. The principal should address all the teachers in English, because under PDAS -
She is appraised in English, and by giving his instructions in Spanish, he makes it IMPOSSIBLE to achieve #5 - and thus hurts her job appraisal.