Greasy Fork is available in English.
This script compares anime entries from user list with entries from anime detail page and bold similar ones
It's a slightly edited version of this script with minor fixes that adapted it to recent changes in MAL code (and also doesn't bold "plan to watch" entries)
Changes:
1.6.6 It doesn't use the API any more, partially – because of this issue
In the meantime, I've overwritten it to simply directly parse the animelist via .html. It however only works with Classic Template. If anyone needs to use it with the the Modern Template – let me know
This change will also lead to longer load times every time there was a list update (or after a cache clear, and for the first time the script is loaded), and the bigger the list – the longer it will take
