The language file has duplicate entries using old translation strings for all pottery sherds. Additionally, the entity strings for sniffer eggs hatching were readded. All these strings are unused by game, and were likely readded to the lang file accidentally when fixing alphabetization issues in 1.20 Pre-release 1. List of outdated translation strings:

item.minecraft.angler_pottery_shard
item.minecraft.archer_pottery_shard
item.minecraft.arms_up_pottery_shard
item.minecraft.blade_pottery_shard
item.minecraft.brewer_pottery_shard
item.minecraft.burn_pottery_shard
item.minecraft.danger_pottery_shard
item.minecraft.explorer_pottery_shard
item.minecraft.friend_pottery_shard
item.minecraft.heart_pottery_shard
item.minecraft.heartbreak_pottery_shard
item.minecraft.howl_pottery_shard
item.minecraft.miner_pottery_shard
item.minecraft.mourner_pottery_shard
item.minecraft.plenty_pottery_shard
item.minecraft.pottery_shard_archer
item.minecraft.pottery_shard_arms_up
item.minecraft.pottery_shard_prize
item.minecraft.pottery_shard_skull
item.minecraft.prize_pottery_shard
item.minecraft.sheaf_pottery_shard
item.minecraft.shelter_pottery_shard
item.minecraft.skull_pottery_shard
item.minecraft.snort_pottery_shard
subtitles.entity.sniffer.egg_crack
subtitles.entity.sniffer.egg_hatch