Does the plug-in support Korean search?
It should work with Korean because it works with UTF-8 encoding.
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Correct, you can justify the styling of the Smart Excerpt part using CSS block in the WPFTS Pro Settings / Search & Output. Your webmaster can use it. Other parts of the search results page are not accessible for the plugin.
@epsilonadmin custom block.
Here is info how to create block - https://www.advancedcustomfields.com/blog/acf-5-8-introducing-acf-blocks-for-gutenberg/
So we register new block, assigned fields for this block.
We add block on page. When I try to search phrase from one of these field - page not added to search result
Should be you are using the "WPFTS :: Live Search" widget. This widget is intended to show this live search data. If you don't want them, simply use the native WP Search widget.
Hope it helps.
Thank you, works like a charm. Much appreciated!