当使用ggplot和ggtext渲染时,Inter不会以斜体显示

国际米兰有 italic specimens on Google Fonts ,但你下载的国际米兰 showtext::font_add_google() 不会呈现为斜体。

举个例子

library(tidyverse)
library(showtext)
library(ggtext)

font_add_google("Inter")
font_add_google("Roboto")

t0 <- tibble(
  x = 1,
  y = 4:1,
  lab = c(
    "This is Roboto",
    "<i>This is Roboto</i>",
    "This is Inter",
    "<i>This is Inter</i>"
    )
  )

showtext_auto()

t0 %>% 
  ggplot(
  aes(
    x, y, label = lab
    )
  ) +
  geom_richtext(
    fill = "grey95",
    family = "Roboto",
    size = 10,
    label.color = NA,
    data = t0 %>% 
      filter(
        lab %>% 
          str_detect("Roboto")
      )
  ) +
  geom_richtext(
    fill = "grey95",
    family = "Inter",
    size = 10,
    label.color = NA,
    data = t0 %>% 
      filter(
        lab %>% 
          str_detect("Inter")
      )
  ) 

正如你所看到的,Roboto用斜体渲染,但国际米兰没有。