Text in Expression Editor:
http.request.uri.path == "/welcome.html" && ip.src.country == "GB"
Text after Path > Rewrite to > Static:
/welcome-gb.html
To have a welcome page in two languages, create two URL rewrite rules with a static rewrite of the path component:
URL rewrite rule #1
Text in Expression Editor:
http.request.uri.path == "/welcome.html" && ip.src.country == "GB"
Text after Path > Rewrite to > Static:
/welcome-gb.html
URL rewrite rule #2
Text in Expression Editor:
http.request.uri.path == "/welcome.html" && ip.src.country == "PT"
Text after Path > Rewrite to > Static:
/welcome-pt.html