remove_word_from_all_bones_in_armeture.py

import bpy

prefix = "Remove_This_Word_From_Bones"

# Find the armature in the scene
armature = None
for obj in bpy.data.objects:
    if obj.type == 'ARMATURE':
        armature = obj
        break

if armature is None:
    print("No armature found.")
else:
    print("=== Renaming Bones in:", armature.name, "===")

    for bone in armature.data.bones:
        old = bone.name
        if old.startswith(prefix):
            new = old[len(prefix):]  # remove the prefix
            bone.name = new
            print(f"{old}  -->  {new}")

    print("=== Done ===")