How do I override default lang strings

[VarunAgw]

{lang="required"}

Suppose there is this code and there is a value defined for it. How do I override it?

If I edit applications/core/data/lang.xml, I think the changes will be lost during an upgrade in the future. What's the recommended way?

[Adriano Faria]

 

[VarunAgw]

Thanks for the quick reply.

[Marc]

Note, if its something you can see on the front end, you can also use the visual translator for  these