Translation of onstage in Spanish

I usually charge 15 dollars per hour, but I don't care very much for the hourly system. I can also help with corrections and suggestions, but only if the original text is a serious translation and not an automatic one.
It certainly is one of the reasons that a student from abroad is not as good in English as people who were born in America. This is an obstacle for all students and a challenge for the educational system.
Thank you for correcting my mistakes. I am really grateful for that and this is exactly what I wanted, I just think about whether something similar exists also in English. I doubt it.