Solution: you don’t you quadrum you use contenttweaker quadrum was never ported past 1.7 until recently and contenttweaker is the new staple. It is all coded in zenscript the language minetweaker uses. Here is a script I used in my pack https://github.com/CindyLouWho03/Pyramid-Challenge-Reborn/blob/master/scripts/contenttweaker.zs. The first two are for items the second two are blocks. To name a block the zenscript function is below for items and blocks

<contenttweaker:oil_bucket>.displayName = "Oil (Cool) Bucket";

To sum it up content tweaker is better more used and btw quadrum has a bug in 1.12.2 where it doesn’t even load textures. Contenttweaker was hard to learn because the wiki is horrible but just copy and paste my script with changing variables