Greasy Fork is available in English.
left and right arrow key navigation to the previous or next manga/manhwa/manhua in the series
Script that allows next/previous manga navigation for the following manga/manhwa/manhua sites:
manganelo.com, mangakakalot.com, mangasushi.net, leviatanscans.com, methodscans.com, skscans.com, reaperscans.com, secretscans.co, hunlight-scans.info, edelgardescans.com, the-nonames.com, webtoons.com
Feel free to post a message for additional site requests