Technically the typeId of effect should not supposed to be translated, but the typeId of effect are being translated too when you change the language in the game. As a result, reading the typeId of an effect is language dependent, only displayName is supposed to be translated not the typeId.

Steps to reproduce:

1. Ensure your language is set to English (United States)
2. Enable "Enable Content Log GUI" in Settings -> General -> Creator
3. Import the attached add-on: milk.mcaddon
4. Create a new world with the add-on and the "Beta APIs" experiment enabled
5. Run /effect @s speed
6. Drink a bucket of Pasteurized Milk. Notice that the effect was removed
7. Exit the world, switch to a different language and rejoin the world
8. Run /effect @s speed
9. Drink a bucket of Pasteurized Milk. Notice that the effect was not removed and an error appears

Observed result:
The code:

for(const effect of e.source.getEffects()) {
  console.warn(`id: ${effect.typeId} - name: ${effect.displayName}`);
}

Gave this warning in game:

[Scripting][warning]-id: lentidão - name: Lentidão
[Scripting][warning]-id: cegueira - name: Cegueira
[Scripting][warning]-id: veneno - name: Veneno

The effect typeID and displayName are translated.

Expected result:
The effect typeID is not translated, only its displayName.