Input English to Spanish as the topic indicates or input Spanish and receive the translation into English as it indicates in your post?
This is a tutorial showing how to do it: https://appinventor.mit.edu/explore/sites/all/files/hourofcode/EnglishSpanishTranslate.pdf
The example is an old one using the Yandex translating component. MIT changed the name of the control to Translate. The example should work if for your student if he/she uses the Translate component instead of the Yandex the tutorial uses..
Does this help Aletha?
This is a complex example of something similar
The Translate component documention: