German is the language spoken nearly all of the time in German companies. If you want to work, you will have to learn the language as well as technical terms in the workplace.
There are courses that combine German lessons and occupational qualification. These are called occupational language courses.
The occupational language course with certification examination prepares you linguistically for the world of work in Germany. It takes about five months if you attend the course every day. The prerequisite for participation is that you have previously attended the integration course or can provide proof of good German language skills (language level B1).
You can obtain the relevant attendance qualification from your employment agency or job centre or directly from the Federal Office for Migration and Refugees.
In addition to occupational language courses with a certification examination, there are also courses for specific specialisations. If you have the necessary prerequisites, you can learn specialised vocabulary in these courses that you need for some professions, e.g. as a doctor or nurse or in technical professions. There are also occupational language courses specifically for people doing an apprenticeship and job-related language courses (Job-BSK), in which you learn specifically what you need for communication in your workplace.
Participation in all occupational language courses organised by the Federal Office is generally free of charge.