I'm studying Spanish, so I made a little script that fetches Calvin & hobbes cartoons in both Spanish and English and then converts each strip into bilingual strip with ImageMagick. It works well enough (>99%).

    #!/bin/bash
    for i in {1..1000}; do x=$(date +'%Y/%m/%d' -d "$i days ago");
    z=$(date +'%Y-%m-%d' -d "$i days ago");
    wget https://www.gocomics.com/calvinandhobbesespanol/$x -O $z-es;
    wget https://www.gocomics.com/calvinandhobbes/$x -O $z-en;
    y=$(cat $z-es | grep -o -P '.{0}https://assets.amuniversal.com.{0,33}' | tail -1);
    f=$(cat $z-en | grep -o -P '.{0}https://assets.amuniversal.com.{0,33}' | tail -1);
    wget $y -O $z-es.gif; rm $z-en; sleep 1;
    wget $f -O $z-en.gif; rm $z-es; sleep 1;
    convert $z-en.gif $z-es.gif -append $z-bi.gif; #ImageMagick
    rm $z-es.gif;
    rm $z-en.gif;
    done;