Update the audibleprompt script to use the arguments from sudo. This should keep locales.

pi3/files/etc/audibleprompt.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 play -qnV0 synth 3 pluck D3 pluck A3 pluck D4 pluck F4 pluck A4 delay 0 .1 .2 .3 .4 remix - chorus 0.9 0.9 38 0.75 0.3 0.5 -t &
-read -rsp "[sudo] password for $USER:"$'\n' password
+read -rsp "$*"$'\n' password
 echo "$password"
 
 exit 0

pi4/files/etc/audibleprompt.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 play -qnV0 synth 3 pluck D3 pluck A3 pluck D4 pluck F4 pluck A4 delay 0 .1 .2 .3 .4 remix - chorus 0.9 0.9 38 0.75 0.3 0.5 -t &
-read -rsp "[sudo] password for $USER:"$'\n' password
+read -rsp "$*"$'\n' password
 echo "$password"
 
 exit 0