Job advice?

So I recently got a job at the elementary school in my town, I went there myself since I've lived in town my whole life, so I know one of the principals and also I know most of the teachers there.

I got recommended by a family friend who worked there, she was a secretary and also the translator at the school.

She knew that I'm pregnant and love kids so she recommended me since the job would be easy on me and didn't require any previous experience or diploma of any kind.

I found out my first day of work that my first week working would be her last week since she had found a better job opportunity somewhere else and would no longer be working there, and I was sad to see her go but extremely happy for her and the new opportunity.

I was officially hired on to be a 1 on 1 student aid/paraprofessional for a special education student. I'm 18 so I just graduated high school and because of my pregnancy I decided to wait a little bit for college, which is why the job was so perfect for me, they didn't require any previous experience in the field.

Anyway fast forward to about a month into the job, I'm also bilingual just like the family friend who got me the job and I guess the my bosses/the principals at the school didn't know when they hired me, but ever since they found out they've been pulling me out of the class and away from my student constantly so I can translate. They just show up or call the classroom and I have to just stop what I'm doing with my student and go translate.

It's gotten so constant that finally another one of the aids asked me how much extra I'm getting paid for translating and I told her that I wasn't getting paid extra at all. She then told me that my friend who had gotten me the job had gotten paid for being the secretary AND translating. She said that she felt like they were just using me and I should say something about it because that wasn't what they hired me on to do and that it wasn't fair that they were taking me away from my student, making me do extra work and not even paying me for it.

I didn't really think much about it until she said

"Just think if they hadn't found out that you're bilingual then they would've had to hire and pay a whole other person to translate, but they're having you do it for free".

I even checked all of the paperwork that I signed and received when I was hired on, it mentions things like sometimes being a substitute if a teacher is gone, having to be an aid for another teacher, even taking the place of another aid if necessary, and all kinds of additional tasks I might have to do but nowhere at all does it say I would have to be the school translator. And so far every check I've received has been only for the aid work I've done, I haven't been paid anything for translating even though I've done it everyday almost twice a day for about 3 months now.

So now I feel like I should really say something or at least ask about it but I'm really afraid to since they're my bosses and at some point one of them was my principle. Also I'm not sure how to bring it up to the principals because I feel like they just see me as some kid who just graduated not an actual adult so I don't know how they'll react.

What's a good way to bring it up to them? Should I even ask or just let it go?

Any advice/tips would be helpful! Thanks in advance!