Hey

UGC has approved a proposal to allow students to go for two degree programmes at the same time but one of the degrees has to be in the regular mode and the other one in distance , open and online learning . But in your case No, You can not pursue two types of three year undergraduate program from delhi University.

But you are allowed to pursue two certificate courses.

Delhi University offers certificate course in many  foreign languages. Along with your three year UG degree you can pursue this language certificate course.

Apart from that you can pursue any diploma or certificate course which is a supplementary course and which doesn't require you to be a graduate as its minimum requirement.

So basically you can pursue these courses only if  they  don't clash with each other (especially examinations).

For foreign language course exams never clash with undergraduate course.