How to load a conditional url in WebviewScaffold?

Hello,

I want to test the language of the mobile (Android) if it is english then I will load an english link or german then I will load a german link?
in other word:
if Android language == en
Lurl = http:// www .google. com
else Lurl = http:// www . google . de

return WebviewScaffold(
appBar:AppBar(
title: Text("Source Web"),
),
url: Lurl,
);

thanks