core-bundle/src/Resources/contao/library/Contao/Controller.php
protected function getSpellcheckerString()
	{
		System::loadLanguageFile('languages');

		$return = array();
		$langs = scan(__DIR__ . '/../../languages');
		array_unshift($langs, $GLOBALS['TL_LANGUAGE']);

		foreach ($langs as $lang)
		{
			$lang = substr($lang, 0, 2);

			if (isset($GLOBALS['TL_LANG']['LNG'][$lang]))
			{
				$return[$lang] = $GLOBALS['TL_LANG']['LNG'][$lang] . '=' . $lang;
			}
		}

		return '+' . implode(',', array_unique($return));
	}
protected function getSpellcheckerString()
	{
		System::loadLanguageFile('languages');

		$return = array();
		$langs = scan(__DIR__ . '/../../languages');
		array_unshift($langs, $GLOBALS['TL_LANGUAGE']);

		foreach ($langs as $lang)
		{
			$lang = substr($lang, 0, 2);

			if (isset($GLOBALS['TL_LANG']['LNG'][$lang]))
			{
				$return[$lang] = $GLOBALS['TL_LANG']['LNG'][$lang] . '=' . $lang;
			}
		}

		return '+' . implode(',', array_unique($return));
	}
Return the languages for the TinyMCE spellchecker

@return string The TinyMCE spellchecker language string