i require is to intake the input from clients through textboxes in that particular language i.e. hindi language in my case. How can that be done !!!
That would depend on operating system's MUI set at that time. It's not code driven. All you need to do is make sure your code handles globalization and localization. Feeding in data in textbox is users setting. They have to set up.
Control Panel -> Region & Language
drives the input.
Read all about them here:
Multiple User Interface (MUI) Language Packs[
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