When I choose 繁體中文 language, I can't serach anything in REI or Creative item search.
But when I switch to JEI, it works fine for me.

Game Version: 1.19.2
Language Reload Version: 1.4.1
REI Version: 9.1.580

Both REI and JEI do search in 繁體中文, but they do not for fallback languages (I used Russian for testing), because Language Reload doesn't modify search logic of these mods. Creative item search works as intended both in 繁體中文 and fallbacks. Can you redo Creative item search without extra mods and tell me if there's still an issue? Make sure the "Multilingual Search" option is enabled in the mod config.

(REI, 繁體中文)

(REI, a fallback language)

(JEI, 繁體中文)

(JEI, a fallback language)

It works fine without other mods.
Would it possible to add the Multilingual Item Name Tooltips?
It will make we can Multilingual search in JEI or EMI.
REI already have the similar feature. But didn't have the tooltips