Technically, it should be professionally-trained editors with a native-level understanding of English. The problem is that anyone who's ever been paid to change words can claim to be a "professional editor," regardless of English proficiency.

Thank you for bringing us these releases! But please consider having native speakers review the quality of your text. The summary contains sentences with mixed tenses, an awkward use of "comprehending," inconsistent use of "the" in front of "Devil Venerable," and at least one typo ("techiniques").

Hello and thank you for your hard work! While you're working on your new and current projects, please consider reading some feedback I wrote up about GHFOD volume 1.
www.reddit.com/r/DanmeiNove...