@KHancock99 noticed that even though the form at https://donate.wikimedia.org/w/index.php?title=Special:LandingPage&uselang=jp&country=JP&utm_medium=Waystogive&utm_source=Waystogive&utm_campaign=C11_Waystogive specifies uselang=jp, some of the labels on the form are still in English:
We've received ~150 unintended recurring complaints from Japan so far in September, and this is likely related. Can we modify the form to translate these fields into Japanese? This is donor-facing and generating lots of help requests.