You can report on your English as an Additional Language (EAL) students, including the language they speak.
Go to School > Data > Data Quality Dashboard then from the left-hand menu select Students > Demographics > Bulk Update Basic details.
A list of all languages are displayed per student which can be downloaded into whichever format you want.
To filter to show only your EAL students, filter the Native Languages column for native languages that are not English.
You could also create a report in the Custom Report Writer about Students. Just add a column for Language(s).
Add a filter to your report to only show EAL students.