beautiful interactive visualizations, this is top shelf in terms of pedagogy and vulgarization
I wonder if that's as big of a problem in the romance languages (which all treat left/right the same way - left = bad, right = good)
- direction
- straight ahead
- civics
- propriety
- Rude: "coarse, rough, unfinished, unlearned" (https://www.etymonline.com/word/rude#etymonline_v_16610)
- Mean: "shared by all, common, general" (https://www.etymonline.com/word/mean#etymonline_v_12495)
And even synonyms like obscene, indecent, or disgusting, which don't evoke this distinction directly, still almost always ultimately rely on separating things based on what is "good" and "clean" according to class distinctions.