In Delhi there are threecolleges which offers the course of Diploma in French Language and the name of the college which offers the course are provided below:

Keshav Mahavidyalaya, Delhi

Janki Devi Vocational Centre, New Delhi

YWCA Women's Training institute, Delhi

Apart from this there are not much of a college found which offers the course in the French language.

For Colleges in India providing the course of French in India, you can consider the link provided below:

https://university.careers360.com/colleges/list-of-french-degree-colleges-in-india

For more information regarding French as a career, consider the link below:

https://www.careers360.com/courses/french-course

I hope this helps. Wish you a great day!