The bug

Flower pot variants have no translation in the en_us file

• block.minecraft.potted_oak_sapling
• block.minecraft.potted_spruce_sapling
• block.minecraft.potted_birch_sapling
• block.minecraft.potted_jungle_sapling
• block.minecraft.potted_acacia_sapling
• block.minecraft.potted_dark_oak_sapling
• block.minecraft.potted_fern
• block.minecraft.potted_dead_bush
• block.minecraft.potted_dandelion
• block.minecraft.potted_poppy
• block.minecraft.potted_blue_orchid
• block.minecraft.potted_allium
• block.minecraft.potted_azure_bluet
• block.minecraft.potted_red_tulip
• block.minecraft.potted_orange_tulip
• block.minecraft.potted_white_tulip
• block.minecraft.potted_pink_tulip
• block.minecraft.potted_oxeye_daisy
• block.minecraft.potted_brown_mushroom
• block.minecraft.potted_red_mushroom
• block.minecraft.potted_cactus

This issue can be fixed by adding these to the language file:

"block.minecraft.potted_oak_sapling": "Potted Oak Sapling",
"block.minecraft.potted_spruce_sapling": "Potted Spruce Sapling",
"block.minecraft.potted_birch_sapling": "Potted Birch Sapling",
"block.minecraft.potted_jungle_sapling": "Potted Jungle Sapling",
"block.minecraft.potted_acacia_sapling": "Potted Acacia Sapling",
"block.minecraft.potted_dark_oak_sapling" "Potted Dark Oak Sapling",
"block.minecraft.potted_fern": "Potted Fern",
"block.minecraft.potted_dead_bush": "Potted Dead Bush",
"block.minecraft.potted_dandelion": "Potted Dandelion",
"block.minecraft.potted_poppy": "Potted Poppy",
"block.minecraft.potted_blue_orchid": "Potted Blue Orchid",
"block.minecraft.potted_allium": "Potted Allium",
"block.minecraft.potted_azure_bluet": "Potted Azure Bluet",
"block.minecraft.potted_red_tulip": "Potted Red Tulip",
"block.minecraft.potted_orange_tulip": "Potted Orange Tulip",
"block.minecraft.potted_white_tulip": "Potted White Tulip",
"block.minecraft.potted_pink_tulip": "Potted Pink Tulip",
"block.minecraft.potted_oxeye_daisy": "Potted Oxeye Daisy",
"block.minecraft.potted_brown_mushroom": "Potted Brown Mushroom",
"block.minecraft.potted_red_mushroom": "Potted Red Mushroom",
"block.minecraft.potted_cactus": "Potted Cactus",