Reference items are including the language extension on their paths

[ejsandoval]

Currently, when navigating from the Reference Index view on other languages, de for instance, the items have wrong paths to the item view due to the path attribute on each item. Creating routes like this http://localhost:8000/de/reference/entry_.de.html.

Here's an example of the item object on the Spanish version for abs() (in progress).

[runemadsen]

@ejsandoval Can you confirm whether this is still happening in the current version of the translation-es branch?