Normal FPS: around 130
If you use stained glass panes, you should be able to place less
I place 52 layers of stained glass in full and the FPS dropped to around 35
This does happen when using simplified Chinese
"金合欢木板" in Simplified Chinese will be translated as "相思木板" in Traditional Chinese
Try to press F1 key
Can confirm in 1.17.1
Simplified Chinese as well