In R geomtextpath, does it's not support chinese

Disclaimer: I'm the other author of {geomtextpath}.

This is a font fallback issue. Smart text renderers try to lookup a particular glyph from a font file, and if they don't find it, they substitute r error the font with another that does have the glyph. Because {geomtextpath} has to do a 'convert font index back to glyph' step, fallback doesn't work.

In this case, the best course of action would be to explicitly use a font that supports Chinese characters. The freely available 'Noto Sans TC' or 'Noto Sans Simplified Chinese' fonts should work, though I don't know whether traditional or simplified is more appropriate here.

library(tidyverse) library(geomtextpath)  # Didn't reprex well because glyphs below get substituted by `??`. plot_data_2 <- data.frame(category=c('品类A','品类B','品类C','品类D'),                           amount=c(1,6,4,7))  plot_data_2 %>% ggplot(aes(x=1,y=amount,fill=category))+   geom_col()+geom_textpath(position = position_stack(vjust=0.5),                            aes(label=category),                            family = "Noto Sans TC")+   coord_polar() +   theme(legend.text = element_text(family = "Noto Sans TC"))