[Solved] WordPress Shortcode Manager Plugin UTF-8 Issues
However, the Chinese characters in the ShortCode just become garbage and bunch ? mark.
The problem is that the ShortCode Manage create a custom database table called wp_shortcodes.
The table and column Collation is by default to latin1_swedish_ci, which doesn't support UTF-8.
So all you have to do is to change the collation for the table and columns to utf8_general_ci or in my case utf8mb4_unicode_ci
I use PHPMyAdmin in CPanel to get it done manually after install the plugin.