Enable the ContentObject provider to work with translated referrers

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #54
| License       | MIT
| Doc PR        |

This PR is to make the `ContentObjectProvider` multilang aware. So that when a `ContentObject