Bash script to find and launch .desktop files with dmenu (currently broken)

xdgmenu.bash

#!/bin/bash
set -euo pipefail
IFS=$'\n\t'
shopt -s lastpipe

IFS=':' read -ra data_dirs <<< "${XDG_DATA_HOME:-$HOME/.local/share}${XDG_DATA_DIRS:+:$XDG_DATA_DIRS}";
locale lang_ab country_ab2 charmap | readarray -t locale;

declare -A dictionary;
fd --unrestricted --type file --extension desktop . "${data_dirs[@]/%/\/applications}" --print0 | 
    xargs -0 rg --multiline "\[Desktop Entry\][^\[]+^(Name(\[${locale[0]}(_${locale[1]}(\.${locale[2]})?)?\])?=.*)" --null --only-matching --replace '$1' -- |
    while IFS= read -r -d '' file && IFS= read -r -d '=' field && IFS= read -r -d $'\n' value; do
        dictionary["$value"]=$file;
    done;

echo "${!dictionary[*]}" | dmenu -i -f | IFS= read target;
exec xdg-open ${dictionary[$target]};