Jekyll CMS Insert Language data file into another data file

Question

Insertion of language definition data yml is not being parsed into another datafile before or after presentation.

I've tried using liquid tags.

front-end code presentation

<div class="small-6 medium-3 large-3 columns">
            {% for network_item in site.data.network %}
              {% if forloop.first == true %}
                <h5 class="shadow-black">{{ network_item.menu_name }}</h5>
              {% endif %}
            {% endfor %}

This is the data file for network.yml still a WIP:

- menu_name: "{{ site.data.language.menu_name }}"

- name: "Icons by Daniel Bruce"
  url: "http://entypo.com/"
  class: "network-entypo"
  title: "Icons by Daniel Bruce"

- name: "Built on Foundation"
  url: "http://foundation.zurb.com/"
  class: "services-newsletter"
  title: "Built on Foundation"

- name: "Images by Unsplash"
  url: "http://unsplash.com/"
  class: "rss-link"
  title: "Images by Unsplash"

- name: "Using Backstretch by Scott Robbin"
  url: "http://srobbin.com/jquery-plugins/backstretch/"
  class: "sitemap-link"
  title: "Using Backstretch by Scott Robbin"

Here's the language item from language.yml

menu_name: "Credits"

In the front-end rendered code I'm getting a title of:

{{ SITE.DATA.LANGUAGE.MENU_NAME }}

This should be the language definition so I can make this theme multilingual.