The English Translation patch for Phantasy Star: Deluxe Edition is now complete and available from the Downloads section. The PS Deluxe Differences page also has another update.
This update to the Differences page adds the Altered Monsters section and additional information on how usage of some items, like the Laerma nuts and Land Rover, has been limited. There's also a bit more on the title screen and the absence of staff credits. I expect this to be the last update to the Differences page until there's another version of the game released, if ever.
If you would like to discuss the patch, please do so in the translation project topic.