The model number of this pronunciation guide for congenital hearing impaired is WH-9000 according to ASCII MSX Magazine 198-11 page 122 but is WH-9500 according to all other sources.
Its release year postdates FS-5500 therefore "1982" on this website is wrong: https://sts.kahaku.go.jp/sts/detail.php?no=100210021450
The English version described to be under development in the MSX Magazine article is not confirmed to have been completed or released.