Translation missing on Accessibility Subtitles

I expected that the correct message appear in:
When tadpoles grow up, at the Acessibility Subtitles, it meant to show the translated message, something like "Tadpole Grown Up"

What actually happened was...:
Instead of that the message appears as "subtitles.entity.tadpole.grow_up"

Steps to Reproduce:
1. Breed a pair of frogs (any variation / color)
2. Wait until one of them place the eggs
3. Wait until the tadpoles hatches
4. Wait until one of the tadpoles to grow, then the message will appear