Hi there!
Look there are many institute in Delhi which teaches French or German here I am listing some of the famous institute to learn these languages
1 alliance institute- this college is has a very good environment but the fee structure is too costly.
2. School of French -this institute is a new institute hare the interaction with the student and the teacher is very good.
3. Inlingua New Delhi-very famous colleges in Delhi this college focus on low batch strength so that it individual can be focused.
Hope this will help
Good luck