The bug
For example, in the attached screenshot, "turtle baby hurts" as opposed to "baby turtle hurts". I don't think I've heard the former phrasing at all before.
This is only true of turtles as other baby mobs do not have distinct sound events for different ages (although they probably should).
How to reproduce
/playsound minecraft:entity.turtle.death_baby master @a
/playsound minecraft:entity.turtle.shamble_baby master @a
/playsound minecraft:entity.turtle.hurt_baby master @a
Related issues
relates to
Attachments
Comments

Confirmed for 1.15
Can confirm in 20w51a.
Can confirm in 21w05b.
Can confirm in 21w06a.
Can confirm in 1.16.5 and 21w08b.
Can confirm in 21w13a.
Can confirm in 21w14a.
Can confirm in 21w15a. You can use the following commands to reproduce this issue:
/playsound minecraft:entity.turtle.death_baby master @a
/playsound minecraft:entity.turtle.shamble_baby master @a
/playsound minecraft:entity.turtle.hurt_baby master @a
Can confirm in 1.17.
Can confirm in 1.17.1.

Can confirm in 21w39a.

Can confirm in 21w40a.

Can confirm in 21w44a.

Can confirm in 1.18 Pre-release 1.

Can confirm in 1.18 Pre-release 2.
Can confirm in 1.18.
Can confirm in 1.18.1.
Can confirm in 1.18.2.
Can confirm in 22w24a.
Can confirm in 1.19.2.

Can confirm in 23w03a.

Can confirm in 23w32a

Can confirm in 1.20.3 Release Candidate 1