Wrong Translation in German in the button Add Test Plans to a Test

Description

Wrong Translation in German in the button Add Test Plans to a Test.

How to reproduce

1. Change the Jira to German
2. Go to a Test and open the Test Plan tab
3. Add one Test Plan

Actual result/Attachments

The button says Dieser Test ist keinem Testplan zugeordnet (This test is not assigned to a test plan=

Expected result{}

It should say: Zu Testplänen hinzufügen (Add to Test Plan)