Changed .localize method to need mandatory translations to be passed as second parameter

src/PKPass.ts

@@ -669,8 +669,8 @@ export default class PKPass extends Bundle {
 	// ************************** //
 
 	/**
-	 * Allows to specify a language to be added to the
-	 * final bundle, along with some optionals translations.
+	 * Allows to add a localization details to the
+	 * final bundle with some translations.
 	 *
 	 * If the language already exists, translations will be
 	 * merged with the existing ones.
@@ -685,11 +685,11 @@ export default class PKPass extends Bundle {
 
 	public localize(
 		lang: string,
-		translations?: { [key: string]: string } | null,
+		translations: { [key: string]: string } | null,
 	) {
 		if (typeof lang !== "string") {
 			throw new TypeError(
-				formatMessage(Messages.LANGUAGES.INVALID_TYPE, typeof lang),
+				formatMessage(Messages.LANGUAGES.INVALID_LANG, typeof lang),
 			);
 		}
 
@@ -698,6 +698,13 @@ export default class PKPass extends Bundle {
 			return;
 		}
 
+		if (!translations || !Object.keys(translations).length) {
+			console.warn(
+				formatMessage(Messages.LANGUAGES.NO_TRANSLATIONS, lang),
+			);
+			return;
+		}
+
 		this[localizationSymbol][lang] ??= {};
 
 		if (typeof translations === "object" && !Array.isArray(translations)) {

src/messages.ts

@@ -36,6 +36,8 @@ export const DATE = {
 export const LANGUAGES = {
 	INVALID_TYPE:
 		"Cannot set localization. Expected a string for 'lang' but received %s",
+	NO_TRANSLATIONS:
+		"Cannot create or use language %s. If your itention was to just add a language (.lproj) folder to the bundle, both specify some translations or use .addBuffer to add some media.",
 } as const;
 
 export const BARCODES = {