Localize "loadingDialog" string in config.xml for Android app

On the startup of my application I would like to localize the loadingDialog string for different languages. My application uses Phonegap/Cordova and uses the loadingDialog preference in config.xml to show an loader on startup. (Documentation here.)

Config.xml

<?xml version='1.0' encoding='utf-8'?>
<widget id="com.app.app" version="1" xmlns="http://ift.tt/18Fk3Vk" xmlns:cdv="http://ift.tt/1cHnIYX">
    <preference name="loglevel" value="DEBUG" />
    <preference name="AndroidLaunchMode" value="singleTop" />
    <preference name="LoadingDialog" value="Loading"/>
    <preference name="backgroundColor" value="0x00000000" />
    [...]
    <name>App name</name>
    <description></description>
    <author email="author@mail.com" href="http://www.website.com">Author</author>
    <content src="index.html" />
    <access origin="*" />
</widget>

In the /res/ directory I have added 10 languages, including /values/, /values-de/ and /values/fr/ and each folder contains a strings.xml document with the following information.

Strings.xml (multiple files)

<?xml version='1.0' encoding='utf-8'?>
<resources>
    <string name="app_name">App name</string>
    <string name="loading">Loading</string>
</resources>

Now I would like to localize the "Loading" string in config.xml for all languages. I have tried to use the code below, but it simply display's "@string/app_name" as the loading message. Is it possible to localize this string on startup, and if so how?

<preference name="LoadingDialog" value="@string/loading"/>

Loading message with this setting:

Any help would be greatly appreciated. Thank you.