Using another calendar

I would like to know if I can another type of calendar specially when I select another language.
Is it possible if I select different language, the calendar become set accordingly to another one?

Anything is possible. You just need to implement it.

Thanks for response.
Do I have to develop myself or the implementation can be done by modern app?

Modern app cannot develop itself, so I'm not sure I understand the question. If you need help and interesting in sponsoring the work, we can certainly help.

Sorry I wasn't clear, Sir.
I thought maybe there is a way to add another calendar to use according the language.
I am really interested to develop this feature if you let me have this chance as a free help to your job. I'm not a professional but I will try my best.
Kind Regards

Contributions are welcome of course.

Awesome, Please let me know what type of standards I should take care of, if you may.
Thanks

Check existing code and follow the same style.

I will Sir.
Thanks again.