Does anyone know where I could watch Digimon Adventure Tri. in English? Every version I find is in Japanese.
No such edition exists presently - there were dub screenings but the license for those had lapsed prior - but Shout! Factory has acquired home distribution rights for the media, and plan do to a dual-language release in the future.
In the meantime, the subbed versions available on Crunchyroll are actually quite well done. They're also available for free, and I'd encourage you to enjoy it while it's still available on the site.