As the title says…
it's unfortunate...
(※Google Translate use)
MCPE-233040
From version 1.21.111 to the current version, emotes (chat display and reading) are now in English, not Japanese...
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As you can see from the photo, the text below is in Japanese, but the emoticon names are in English. (Although not shown in the photo, the chat and voice output are also in English.)