If you attend a month-long language course abroad you can submit an application to the Study Grant Authority to receive your study abroad grant, opens an external URL in a new window. The pre-requisite is getting a minimum of 3 ECTS credits transferred.
If the course is less than one month, you can apply for study allowance ("Studienunterstützung") (PDF. German only), opens a file. This is usually approved based on the study abroad grant.