I already finished the anime in sub. I was hoping we can use the dub quotes as the Japanese subtitles aren't really accurate and reliable. As much as I don't really like the english dub, it's the better option in my opinion as it's more reliable and stuff.
Some of the lines in the sub aren't really correct such as in the first episode where the opening ceremony was referred to as the matriculaiton ceremony which is incorrect. However, you can ask the others about this.