Minecraft wiki entry for Development_versions, associated text: Changed some GUI text strings.
Changed the second line of the data pack error message from "You can either try to load only with vanilla datapack ("safe mode") or go back to title screen and fix it manually." to "You can either try to load it with only the vanilla data pack ("safe mode"), or go back to the title screen and fix it manually."
Minor grammatical changes were made.
Changed "This pack was made for a newer version of Minecraft and may no longer work correctly." to "This pack was made for a newer version of Minecraft and may not work correctly." (pack.incompatible.confirm.new).
Changed "Do you want to add following packs to Minecraft?" to "Do you want to add the following packs to Minecraft?" (pack.dropConfirm).