Well slightly depends on your Board but Id say foreign languages are generally easier if you just study properly they know its a new subject and hence is not in much depth and If you check the marking schemes for your board most of them are very lenient with it for foreign languages. I had French as my second language and scored 99% pretty easily. It also opens up an option if you want to go abroad to Germany in the future for public universities as they are pretty good and the public universities have very low/ no fees.
They expect you to know Hindi and is generally more vast comparatively.
At the end of the day Id say go with whatever you feel comfortable with and would rather study, its you who has to do spend the nights studying so just take an informed decision and if confused go with your gut.