If the husband or wife are living outside Germany and Want to join their spouse in Germany, they must first demonstrate a basic proficiency of the German language prior to their departure. This is a requirement for the issue of a residency permit, which they will need to enter Germany.
The Goethe-Institut examination is accepted as proof of these basic German language skills. You can find answers to some of the frequently asked questions concerning this examination, the reunion of a spouse, and even a sample exam.