Papyrus is the script language used for Fallout 4, the same as Skyrim.
Pyro is a parallelized incremental build system for TESV, SSE, and FO4 projects. All-in-one tool for compiling Papyrus scripts, packaging BSA and BA2 archives, and preparing builds for distribution. Can be integrated as external tool into any IDE, allowing mod authors to "Instant Build" projects with a single hotkey. 650px|center|thumb|https://www.nexusmods.com/fallout4/mods/52631|link=https://www.nexusmods.com/fallout4/mods/52631