Since the update to the latest version of WPML String translation 3.5.0. ,
Wordfence scanner is detecting: File appears to be malicious or unsafe: wp-content/plugins/wpml-string-translation/lib/StringScanning/vendor/wp-cli/wp-cli/features/context.feature
I already deleted the WPML String Translation plugin completely and download a fresh copy from the wpm.org site - installed that version and die a rescan with Wordfence --> the alert appeared again.