Learning one counts, please be serious. This is for a report I am doing with 2 friends. I'll start
English, Urdu, German
This is legit a good question.
Yes this happens.
People think hindi is like a unified language in India. This could not be further from the truth. I lived for a couple of years in Chennai and barely anyone spoke Hindi. All they spoke was Tamil and English. This is true for all the south Indian states (Chennai in Tamil Nadu speaks Tamil, Karnataka speaks Kannad, Telangana speak Telugu, Kerala speaks Malayalam). In essence, there are around 22 major languages in India and depending upon where you go you can literally face a language barrier in your same country!
Also, people in Puducherry (A small place in south India also speak Portuguese)
There is a friend in my university from South India and he only communicates in English cause he does not know Hindi.
So technically English is the only language that people all around India speak, all other languages are regional in nature.
It's kinda like how English French and German all use the same Roman script but are different languages.
Similarly, the script used for Hindi (Devnagri) is shared by Sanskrit, Nepali, Konkani, Bhojpuri and Maithili.
They have quite a lot of shared words but grammar and other rules are very different.