Hi Palak,
Welcome to the QuickSight Community.
Regarding internationalization and localization you may find language and interface elements supported in Quicksight documentation link: Choosing a language in Amazon QuickSight - Amazon QuickSight
It will further help if you can share your more specific requirements. In embed experience you can configure locale using javascript content option QuickSight Developer Portal
const contentOptions = {
locale: "ja-JP", // YOUR LOCALE HERE
};
One common best practice I see many users adopting is timezone adjustment by storing calculated fields for timezone offsets, and converting timezones from UTC as mentioned in following community article: Time Zone Adjustments
Regards,
Anwar Ali