Category Archives: How to

How to set and use a multilingual child theme.

How to: A multilingual navigation menu


Navigation Menu is a theme feature introduced with Version 3.0. WordPress includes an easy to use mechanism for introducing customized navigation menus into a theme.
The dashboard interface has made great progress for users (and newbies) from version to version.
Inside a theme, a navigation menu appears at a location, currently near the header. A menu has a structure made with menu items to redirect to webpage containing (as WordPress describes them) a static page, a list of posts in a category, of a target date, or resulting of a query…
In dashboard side, we find in “appearance/menu” page, the location settings and how to set the menu with his structure.
Note: A menu structure can be attached to a widget.

In multilingual context on a standalone WordPress install,
for developers, it is possible to create a virtual location for each language (as presented in child theme Twentyfourteen-xili or other previous embedded (bundled) themes of WP install).

A menu location contains
   one menu structure with
      various menus items.

But there are (huge) thousand of themes (free or commercial) following or not following the codex rules of development.

Since 5 years, on the long way to work in the thousands of lines of WP source, it was recently possible to use powerful pieces of code to create menu item like insertion points replaced by navigation list elements.

A multilingual navigation menu with xili-language with menus insertion point.

In the content strategy of the example, we decide that the contents of menu are not similar in each language.
First step: a menu (structure) per language
These structures should not be attached to a location to remain free to be used by menus insertion point.
Second step: a core menu attached to the menu location of the theme.
Third step: a menus insertion point and a language list insertion point inside the core menu.

Limitation: a menu structure associated to an insertion point must not contains another insertion points.

Some screenshots:

English menu w/o location
English menu w/o location
Menus Insertion item
Menus Insertion item before adding to structure
Core menu after insertion
Core menu after insertion

Plugin JetPack: what about with class Featured_Content from theme TwentyFourteen ?

Plugin JetPack has a strange behavior with class Featured_content of TwentyFourteen theme and child theme like here TwentyFourteen-xili!

Feedback after investigations

In TwentyFourteen, in sub-folder inc file featured-content.php contains class Featured_Content. It is possible to copy (and modify) inside child theme (as done in TwentyFourteen-xili to include sub-selection and cache according current language). As here in frontpage, only featured posts in a language are displayed. Because functions from functions.php are fired before those of parent theme: no problem, modified class has priority!

All is working well until JetPack will be installed… no sub-selection 🙁
By tracing, the modified class is not used
In JetPack settings, no way to disable (not load) Featured_Content Class, only a class with same name loaded before is possible !
How to force to download the child theme Featured_Content Class ?

In sources below (theme-tools.php – extrait ci-dessous) : no filter, only test with class_exists

Only possible solution, creating a plugin with a filter before the time where JetPack load the modules (plugins_loaded – priority 100).

Remember it is impossible to add filters “plugins_loaded” inside functions.php of a theme. It is too late according timeline of wp_settings.

The code below show that featured-content.php file will be required before JetPack requires its modules:

This example code lines are easy to insert in a very simple plugin.
For multilingual context, these lines (with options) are now inside xili-language (v 2.11.1+). Here, you will see in real time that TwentyFourteen-xili multilingual recovers his behavior and sub-select featured posts in frontpage.