These strings were changed in this beta, however they still don't match Java's established format. Therefore this change sidesteps parity, interoperability, and consistency.

Format

Old
potion.effectName.postfix

Current beta
potion.effectName.name
potion.effectName.splash.name
potion.effectName.linger.name

Java
item.minecraft.potion.effect.effect_name
item.minecraft.splash_potion.effect.effect_name
item.minecraft.lingering_potion.effect.effect_name

Confusing effect names

The current strings use names for potions that are not used anywhere else, like damageBoost instead of strength, which is just confusing.

Actual effect name	Effect name in bedrock lang files
strength	damageBoost
fire_resistance	fireResistance
instant_damage	harm
instant_health	heal
invisibility	invisibility
slowness	moveSlowdown
slow_falling	slowFalling
speed	moveSpeed
night_vision	nightVision
poison	poison
regeneration	regeneration
turtle_master	turtleMaster
water_breathing	waterBreathing
weakness	weakness