Localised pages should direct user to the localised Wayback

[anjackson]

Wayback Landing Page is always English.

Example:

From the Welsh version of:

Special Collections > Climate Change Debates > 10:10uk

https://dev.webarchive.org.uk/cy/ukwa/collection/369 >
https://dev.webarchive.org.uk/cy/ukwa/wayback/OA/29991231999999/http://www.1010uk.org/

We land on

https://www.webarchive.org.uk/wayback/archive/20170630224615/https://1010uk.org/

It should be

https://www.webarchive.org.uk/wayback/archive-cy/20170630224615/https://1010uk.org/

[ldbiz]

Only needs to be done for Welsh; wayback doesn't support Scottish Gaelic at the moment I think.