The bug

Survival players can write raw JSON text components into signs, and they are interpreted. This exposes game internals that should be reserved for players with cheats, similar to MCPE-92635

How to reproduce

1. Enter a world with cheats disabled in survival mode
2. Place a sign
3. Type in this:

{"rawtext":[{"translate":"gameTip.openInventory.touch"}]}

→ The sign says "Tap the :tip_touch_inventory: button to open your inventory"

Raw translation string IDs, especially unformatted ones, should not be exposed/accessible in survival mode.

Expected behavior

Sign shows exactly what was typed into it, unless you were in creative mode/had cheats enabled.