
https://www.thequint.com/news/india/hindi-is-not-indias-national-language-but-the-official-language
That official language, is also only for the central government. State governments in the South don't have Hindi as their official languages.
Andhra Pradesh => Telugu and English Telangana => Telugu, English and Urdu (Dakkani) Karnataka => Kannada and English Tamil Nadu => Tamil and English Kerala => Malayalam and English
Even the Supreme Court of India said this myth, but the constitution says otherwise: https://www.outlookindia.com/national/hindi-is-national-language-says-supreme-court-what-does-the-constitution-say--news-308390

What does official language of the centre mean? Aren’t we all a part of the centre here?
Official language if the centre means that all the decisions and orders made by the central government will be recorded and issued to the public in that language. But guess what, along with Hindi, English is also an official language of the centre. By constitution, Central Government is bound to issue GOs in both Hindi and English. There is no obligation for the South to learn Hindi.

Isn't this scripted? I rarely see anyone using hindi in office call

Not necessarily, I use Hindi often and honestly if someone does not understand I switch to English. I am comfortable with both honestly and I am not from a Hindi speaking state either, but I just don’t get the whole language elitism with English

People sometimes unintentionally switch to Hindi if it was their first language. my colleague used to get pissed when I did that while talking to him because he doesn't understand it well enough.
I tried changing but it just happens sometimes, can't really help slip ups. It's not easy to translate while talking in real time.

Even after someone politely asked him to continue in English, he decides to use Hindi. And then tries to justify it on top of that. What a stupid guy.

Divided by language, united over zoom!