Keyboard Data ( Chinese & Japanese )
I know there is plenty of questions are floating around in internet about this topic since so long. And I too had the same question, what is this "keyboard data (Chinese & Japanese)", is it any kind of malware or any type of spying app that present in the backup section of iCloud.
Fortunately I had also contacted to apple support about this few days back and they had cleared all of my doubts.
This is their own apple app which keeps keyboard data that could be used for better suggestions in keyboard. As apple has native support of Chinese and Japanese languages too, this bracketed words (Chinese and Japanese) are the indications of this only. There is no another meaning of this.
Thats all I have got from the support team. Hope this could clear all the doubts that are floating around.
iPhone 12, iOS 14