Board Thread:Questions and Answers/@comment-2604:6000:E247:9B00:A88C:2E2C:450:F4BB-20170908031138/@comment-6986530-20170908043345

There are no official English translations.

A fan translator that goes by pricechecktranslations on Tumblr has fully translated Cloture of Yellow here and is working on translating Wiegenlied of Green here, their intention being to translate all of the books in the series.

Other fan translations of Evillious Content exist, but I would not recommend most of them as they were carried out by people without a lot of experience translating Japanese (or, in fact, none at all.) They range from awkward and weird and sometimes inaccurate (on the evillioussidestories blog) to complete abominations (the previous "translations" of Cloture and Wiegenlied)

I do believe someone is translating Praeludium of Red, and there is a to my knowledge half-finished translation of The Lunacy of Duke Venomania by a different person, but I don't know how experienced either of these translators are.