Are there German universities with Interior designing courses taught in English?What is the scope of Interior Designing in Germany?

Yes. More than 300,000 international students migrate to Germany for higher education every year and most of the courses are taught in English.

Some of the most compelling reasons to choose the interior design in Germany are - 

Global Recognition
The degrees in interior design offered by universities in Germany are universally recognized. Top companies in Germany and abroad accept these degrees as a benchmark for quality education.

Free Education
Public universities like the University of Applied Sciences Stuttgart, Humboldt University of Berlin, and the Dresden University of Technology in Germany offer free education to students, irrespective of their nationality. It is one of the few countries in Europe where international students are not charged any tuition fees. 

Job Opportunities
Germany is a great choice for those who want to work in the design industry. Work opportunities are ample in the country as Germany has a shortage of 400,000 skilled labourers.

Shortlisted Top interior design colleges in Germany for you are - 

Berlin International University of Applied Sciences,
Dresden University of Technology,
University of Applied Sciences, Stuttgart
Leibniz University Hannover,
and Hannover University of Applied Sciences and Arts

The eligibility criteria for international students are listed down -

Academic School Transcripts 
Bachelor’s Degree
English Language Proficiency Test Scores
GRE/GMAT Scores
Work Portfolio & CV
Student Visa
Valid Passport

Let me know if you any more questions.