Adds a method to get lanugage label from a field with $fields->getLangLabel("body")

HelperFieldsLanguageLabel.module

<?php

/**
 *  ProcessWire module
 *  
 *  Example Fields Language Label Helper
 *  Gets the language value of a field label for the current user's language
 *
 *  Once Installed it will add a new method to fields
 *  
 *  Usage in templates 
 *  $label = $fields->getLangLabel('body');
 *  
 *  Usage in modules
 *  $label = wire("fields")->getLanguageLabel('body');
 *  
 */

class HelperFieldsLanguageLabel extends WireData implements Module {

    /**
     * getModuleInfo is a method required by all modules to tell ProcessWire about them
     * @return array
     */
    public static function getModuleInfo() {

        return array(
            'title' => 'Fields Language Label Helper',
            'version' => 100,
            'summary' => 'Adds a method to get language label from a field. $fields->getLangLabel(\'fieldname\')',
            'singular' => true,
            'autoload' => true,
            );
    }

    public function init() {}

    /**
     * when API and page to render is fully ready
     */
    public function ready() {
        // add a new method to fields to easily get a language value of a field label
        $this->fields->addHook("getLangLabel", $this, "getLabelLang");
    }

    /**
     * return language version of a label from a field
     */
    public function getLabelLang($event){
        $field = $event->arguments(0); // field name
        $lang = wire("user")->language->isDefault() ? "" : wire("user")->language->id;
        $event->return = wire("fields")->get($field)->get("label$lang");
    }


}