The bug

When making a tadpole grow into a frog, with subtitles ON, it appears as subtitles.entity.tadpole.grow_up and it's not translated.

Steps to reproduce:

a)

• Execute /playsound entity.tadpole.grow.up master @p
  •  Sound plays, but the subtitle is not translated: subtitles.entity.tadpole.grow_up

b)

• Spawn a tadpole with the tadpole spawn egg
• Feed the tadpole with slimeballs until it converts to a frog
  • The untranslated subtitle subtitles.entity.tadpole.grow_up shows up but the others from the frog appears normal.

    Expected behaviour:

• This subtitle should be translated as "Tadpole grows up" or "Tadpole converts to Frog".