TYPO3: One domain per language with RealURL

config.ts

[globalVar = GP:L=1]
config {
  sys_language_uid = 1
  language = en
  locale_all = en_CH.utf8
  htmlTag_langKey = en
  baseURL = http://default.domain.tld/
}
[global]

menu.language.ts

lib.menu.language = HMENU
lib.menu.language {
	special = language
	special.value = 0,1
	1 = TMENU
	1 {

		NO = 1
		NO {
			# Override the standard menu item value (which is the page title) with our own cObject
			stdWrap.cObject = TEXT

			# Use the TypoScript option split function to display different values for the first and second item
			stdWrap.cObject.value = DE || EN
		}



		ACT < .NO
		ACT {
			ATagParams = class="active"
		}

		USERDEF1 = 1
		USERDEF1.doNotShowLink = 1

		USERDEF2 < .USERDEF1

	}

}

realurl_conf.php

<?php

$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'] = array(
	'default.domain.tld' => array(
		'init' => array(
			'enableCHashCache' => true,
			'appendMissingSlash' => 'ifNotFile,redirect',
			'adminJumpToBackend' => true,
			'enableUrlDecodeCache' => true,
			'enableUrlEncodeCache' => true,
			'emptyUrlReturnValue' => '/'
		),
		'pagePath' => array(
			'type' => 'user',
			//'disablePathCache' => true,
			'userFunc' => 'EXT:realurl/class.tx_realurl_advanced.php:&tx_realurl_advanced->main',
			'spaceCharacter' => '-',
			'languageGetVar' => 'L',
			'rootpage_id' => '2'
		),
		'fileName' => array(
			'defaultToHTMLsuffixOnPrev' => 0,
			'acceptHTMLsuffix' => 0
		),
		'preVars' => array(
			array(
				'GETvar' => 'L',
				'valueMap' => array(
					'de' => 0,
					'en' => 1
				),
				'valueDefault' => 'de',
				'noMatch' => 'bypass'
			)
		),
		'postVarSets' => array(
			'_DEFAULT' => array(
			)
		)
	),
	'_DOMAINS' => array(
		'encode' => array(
			array(
				'GETvar' => 'L',
				'value' => '0',
				'useConfiguration' => 'default.domain.tld',
				'urlPrepend' => 'http://default.domain.tld',
				'ifDifferentToCurrent' => 'true'
			),
			array(
				'GETvar' => 'L',
				'value' => '1',
				'useConfiguration' => 'secondary.domain.tld',
				'urlPrepend' => 'http://secondary.domain.tld',
				'ifDifferentToCurrent' => 'true'
			)
		),
		'decode' => array(
			'default.domain.tld' => array(
				'GETvars' => array(
					'L' => ''
				),
				'useConfiguration' => 'default.domain.tld'
			),
			'secondary.domain.tld' => array(
				'GETvars' => array(
					'L' => '1'
				),
				'useConfiguration' => 'secondary.domain.tld'
			)
		)
	)
);
$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl']['secondary.domain.tld'] = $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl']['default.domain.tld'];