{
"последствия":
[
{
"type": "attribute",
"Эффект": "generic.movementSpeed",
"мин": 0,
«макс»: 100,
"проценты": правда,
"id": "effect.moveSlowdown",
"Количество": 1,
"ModifierType": 2
}
]
}
.

A player with a weight of 50kg does not slow down but even runs and walks faster.
How do I make a player walk more slowly at 50% of the weight load?

language. thats why. it has all ot be in english. (at least the keys)

Последствия=Effects

Yeah you still need to write this in english.
My tool does only check for the english words in the Keys.
so Effects has to be named effects because its checking for effects not Последствия

Yes I wrote it in English it's just a translator translated it

Ok this is pretty hidden do to curse not liking code really well but here is a example one that i copied out of the example sheet for Effect on the cursepage.

{
	"effects": 
	[ 
		{ 
			"type": "potion", 
			"cooldown": "20", 
			"min": 1, 
			"max": 200, 
			"potions": 
			[ 
				{ 
					"name": "minecraft:speed", 
					"duration": "40", 
					"amplifier": 1 
				} 
			] 
		} 
	] 
}

This is how the stuff has to look like uppercase and lowercase matter too. why do you think i typed these names how i typed them