>>34453362Long term Kiara watcher here.
The no bullshit correct answer is that Kiara got shit on very hard for speaking japanese very early on her career and that left a mark on her. She lost her JP audience shortly after, and lost her confidence to speak with JP members over time because of her self-confidence issues balancing JP content (which she wants to make but fears her audience doesn't want) with EN content (which excludes JP members).