The bug

Llamas and drowned use the subtitle subtitles.entity.llama/drowned.step and turtles use subtitles.entity.turtle.shamble, which show as Llama/Drowned steps and Turtle shambles in-game. All other mobs (that are not missing footstep subtitles as described in MC-91893) use subtitles.block.generic.footsteps, which shows as Footsteps.

Turtle and Drowned also use subtitles.entity.turtle/drowned.swim ("Turtle/Drowned swims") instead of subtitles.entity.generic.swim ("Swimming").

To reproduce

• Enable subtitles in Options/Music and Sounds
• Summon a Llama, Drowned, or Turtle
• Summon any other ground-based mob (except for Polar Bears, Husks, Strays, Wither Skeletons, or Parrots)