Implement utility function that recursively localizes based on the config data (implements #54)

module/config.mjs

@@ -42,6 +42,11 @@ export const syncMilestones = [
 
 export const syncDice = `1d20`;
 
+export const localizerConfig = {
+	subKeyPattern: /@(?<key>[a-zA-Z\.]+)/gm,
+	maxDepth: 10,
+};
+
 export default {
 	stats,
 	statDice,
@@ -57,4 +62,5 @@ export default {
 	itemTiers,
 	syncMilestones,
 	syncDice,
+	localizerConfig
 };

module/utils/localizer.mjs

@@ -0,0 +1,21 @@
+import { localizerConfig } from "../config.mjs";
+
+export function localizer(key, args = {}, depth = 0) {
+	/** @type {string} */
+	let localized = game.i18n.format(key, args);
+	const subkeys = localized.matchAll(localizerConfig.subKeyPattern);
+
+	// Short-cut to help prevent infinite recursion
+	if (depth > localizerConfig.maxDepth) {
+		return localized;
+	};
+
+	for (const match of subkeys) {
+		const subkey = match.groups.key;
+		localized =
+			localized.slice(0, match.index)
+			+ localizer(subkey.slice(1), args, depth + 1)
+			+ localized.slice(match.index + subkey.length)
+	};
+	return localized;
+};