How to get a list of enabled locales in SAIL

Such a function does not exist. You will have to create a constant holding these values.

Is any Functionality is available now for this in latest version or are we still following the list in constant method ? 

No

Thanks For that , 

In Appian, I want users to select a locale from a dropdown that simulates Admin Console → Enabled / Primary Locales, using a constant.

However, admins may later disable locales in the Admin Console that are still present in my constant. This creates a mismatch where users can select a locale that is no longer enabled in Appian.

Question:
How can I keep my UI locale dropdown in sync with the real-time enabled/primary locales in the Appian Admin Console?
Is there any function, system value, or workaround to dynamically fetch or validate enabled/primary locales instead of hardcoding them in a constant?

Thanks For that , 

In Appian, I want users to select a locale from a dropdown that simulates Admin Console → Enabled / Primary Locales, using a constant.

However, admins may later disable locales in the Admin Console that are still present in my constant. This creates a mismatch where users can select a locale that is no longer enabled in Appian.

Question:
How can I keep my UI locale dropdown in sync with the real-time enabled/primary locales in the Appian Admin Console?
Is there any function, system value, or workaround to dynamically fetch or validate enabled/primary locales instead of hardcoding them in a constant?