Minimum textsize is 12px in IME language regions using Chrome and Safari

Newest version of Chrome and Safari set minimum textsize to 12px in IME regions like Chinese, Japanese and Korean, and this setting cannot be changed in anyway now. Please give me a solution to fix this problem.

Temprary solution is to change the Chrome’s default language to English (America) in Settings->Show Advanced Settings->Language and Input Settings (Caution, English (America), not English, English can’t be setted as chorme language). But are there any other solutions to fix that? This solution seems so difficult for beginners.