For departing passengers from HND, myself, husband and daughter got to try out the Face Express service at HND in September (used JAL for flight to U.K.).

At no time did any of us see an option to select English so we all muddled through with the default Japanese setting. Perhaps the option is there, but we registered three times (with a Japanese passport and then two British ones) and never worked out where it might be.

Language doesn’t seem to be mentioned in the information on how to use the service.

https://www.tokyo-airport-bldg.co.jp.../000011284.pdf