Well, According to my knowledge, there are many institutes in Delhi to learn french language but you need to identify which one teaches to the best level. Here is a list of new opened and old institute to learn french from in delhi.

1:- Alliance Frances :- So, it is the embassy institute to learn french language, very good environment but too costly to afford for everyone. Hence I would not recommend it if you do not want to waste your money.

2:- “School of French” They recently started their courses of French language, I visited there and my cousin is taking classes with them. He told me that teachers are awesome at School of French and they personally guide you to get better opportunities in the market after you learn french language completely. They have industry knowledge and gives you company information also to give interviews there. They have very low fee at present only 9 thousand for each level, A1-A2-B1-B2. They do not have sub-levels, straight forward 4 levels complete 100% of the language. You can visit their site or call them on Home 2 or 9211850–850.

3:- Inlingua : You can try to inlingua as well but I am not sure if they can teach you all levels, at some levels they do not have teachers.

4:- Delhi University :- You can try part time courses of delhi university as well as they provide it but it is time taking, takes around 3 years to complete.

5:- JNU and Jamia:- Both the universities are providing language courses but too difficult to get into as a long queue there of thousands of students and again it takes around 3 years to complete the language.