You can change the language from the Manage Students Tab in a teacher account or the Manage Users Tab in an administrator account.

Clicking on the student's name will open an information panel with a language option.

Selecting the pencil icon in the lower right will allow you to change the language of Reflex for the student.

From the Class Management page, you also have the option to print the Spanish version of the Parent Letter from the print menu on the lower left.