Not an internship; a salary. If you want people to work, pay them, and pay them properly.
On a recent trip - deployment - work related - abroad, I was in need of several interpreters - good ones - for a short period of time.
Thus, a colleague and I spent a full day in the local university, with the permission of the Rector, and the Dean, and the professor of the students, and interviewed a number of candidates. Basically, these were the brightest of the students who had studied English, and obviously, they were also native speakers of their own language, - and we interviewed them for these positions, which required a lot of translation both ways; the positions were well paid.
We arranged that the students would not be penalised for missing classes while they worked with us - very intensively - for the best part of a week. Moreover, we ourselves gave them a further briefing as to what the work actually entailed. Subsequently, they all received references.