New line break in language record value

Is it possible to edit the message in the Value field in language record? I would need a new line.

Thank you

It may depend...
Newlines may just be 'ignored' when rendered by the browser.
If you put in an HTML break <br/>, then it may show as-is if not wrapped in .Raw()
Which resource string do you want to add newlines to?

newsletter.resultactivated

Try this:
In this file, \Views\Newsletter\SubscriptionActivation.cshtml
Change from
@Model.Result
to
@Html.Raw(Model.Result)

Then, edit your locale resource string and use <br/> where you want the newlines.