When choosing to create a page with type 'Link to URL', the URL itself is not translatable.
For being able to get the translation we need to create a page per language with a user segment based on that language to overcome this issue.
1/ Create a page of type "Link to URL" in two languages.
2/ to be completed...
This is experienced as a bug by users. Because they cannot benefit from the same logic for managing translated contents.
When a user create/edit a page with type 'Link to URL'
Then the user has option to choose a language to translate the URL link