Attack on Titan was the editor renaming it IIRC. Then sure enough later on out comes the attack titan, the literal translation of shingeki no kyojin and presumable namesake of the series.
There are a bunch where they just use the Japanese title or even shortened title like mushoku tensei or konosuba with English translation following it, or the full title in English in the case of konosuba.
Attack on Titan was the editor renaming it IIRC. Then sure enough later on out comes the attack titan, the literal translation of shingeki no kyojin and presumable namesake of the series.
There are a bunch where they just use the Japanese title or even shortened title like mushoku tensei or konosuba with English translation following it, or the full title in English in the case of konosuba.