Greasy Fork is available in English.
Turn plain text URLs into clickable links
The script has a weird bug that is converting to real iframes on code pages on greasyfork
http://greasyfork.icu/en/scripts/407734-remova-propagandas-e-temporizadores-ao-baixar-filmes/code
You could improve your script by making it able to convert all these test cases
https://github.com/dartraiden/Linkification/blob/master/testcases.txt
To links