The Blue Arc seems to be getting pretty good.
I don't know if it has bad translations, but it has the earlier chapters.
The second half of the third season finished airing in June 2018. There is no official news on the 4th season. However, rumors say it will be later in 2019.
Are you up to date on the manga? If you are, you should know where that rumor comes from. If you aren't just sit back, relax, and enjoy the ride-- you'll understand where that rumor comes from soon :)