That is how it works! 
Discussion
I'm still seeing in Japanese and Chinese, even when Auto Translate is On..😼
Make sure you don’t have Japanese and Chinese in your list of preferred languages in iOS settings.
Still not translates. Does it should be only 'English' in 'preferred lang list'? I have no 'chinese' or 'japanese' listed there.
Could you please share screenshots of the following? (1) iOS preferred languages settings (2) iOS settings for Damus (3) in-app Damus settings, specifically the Translations section.
Great❗️👏