If after removal you ever need these fonts, but you can't be sure which package is needed, just install kubuntu-desktop, it should pull sufficient regional fonts.
This could also trigger removing of other regional fonts, remove them with sudo apt autoremove Removing these metapackages won't do harm. Removing these fonts may remove kubuntu-desktop metapackage. Remove them all with this command sudo apt remove fonts-lao fonts-lklug-sinhala fonts-sil-abyssinica fonts-sil-padauk fonts-tibetan-machine fonts-thai-tlwg You might want to remove these fonts packages too!
Remove it with sudo apt remove fonts-kacst-one Other font you mentioned are kacst (which are arabic variants). Remove it with the command sudo apt remove fonts-noto-cjk Unfortunately, it depends on fonts-noto-cjk which is very large in size (almost 110 MB) and sometimes causes hang on font cache refreshing. You are using Kubuntu I see from the screenshot. There are two modes for finding and displaying repeated words.
