A day for 'twin tails'

Raising three daughters in Japan, the term "twin tails" is something I am very familiar with. I know it is not English, but has the term been assimilated into English language? 'Twin tails' is the Japanese term for two ponytails, one either side of the head. The term was popularized from anime characters, such as Sailor Moon.

Sailor Moon is such a cultural icon that twin tails experienced a boom in Japan in the 1990s. But there are several other anime characters who are known for their "twin tails". In order to promote Japan's "twin tails", not just as a hairstyle but as a cultural expression also, Twin‑Tail Day (ツインテールの日) was created. It is on February 2nd annually, as the number 2 appearing twice is like “twin.”

The anniversary was established by the fashion brand Rough Valley and the Japan Twin‑Tail Association to highlight the charm of the twin‑tail hairstyle. The Japan Twin‑Tail Association supports the day by organizing auditions for models and idol groups as well as producing photo books, T‑shirts, and other themed merchandise with twin‑tails.