Translated 404 Document with Neos 4.3

error.fusion

error {

    // find the 404 document
    @context.notfoundDocument = ${q(site).children('notfound').get(0)}

    // use german not found page if the request uri starts with /de
    @[email protected] = ${q(value).context({'dimensions': {'language':  ['de']}, 'targetDimensions': {'language': 'de'}}).get(0)}
    @[email protected][email protected] = ${String.startsWith(request.httpRequest.serverParams.REQUEST_URI, '/de')}

    // render the 404 document via /root path
    4xx {
        @position = 'start'
        condition = ${statusCode >= 400 && statusCode < 500 && notfoundDocument}
        renderer = Neos.Fusion:Renderer {
            @context.node = ${notfoundDocument}
            @context.documentNode = ${notfoundDocument}
            renderPath = '/root'
        }
    }
}