I need to do a non-English report including the red line from plot(aov, which=1), which I don't know how to reproduce. I'm thinking is I just replace the labels that it would be good. What I have so far is almost what I need, the only thing that need to change is what's right above the plot: Residuals vs Fitted; I'd like it to either be changed to "Résidus vs Valeurs prédites" or not be displayed. How I got to where I am:
my_aov <- aov(...)
plot(my_aov, which=1, ann=FALSE)
title(main="Mon titre",
xlab="Valeurs prédites",
ylab="Résidus")
Thank you kindly for your help