diff --git a/build/npm/update-localization-extension.js b/build/npm/update-localization-extension.js
index 43bc792d9f8..7c6a73aa9d8 100644
--- a/build/npm/update-localization-extension.js
+++ b/build/npm/update-localization-extension.js
@@ -25,7 +25,7 @@ function update(options) {
 		throw new Error(`${location} doesn't exist.`);
 	}
 	let locExtFolder = idOrPath;
-	if (/^\w{2}(-\w+)?$/.test(idOrPath)) {
+	if (/^\w{2,3}(-\w+)?$/.test(idOrPath)) {
 		locExtFolder = path.join('..', 'vscode-loc', 'i18n', `vscode-language-pack-${idOrPath}`);
 	}
 	let locExtStat = fs.statSync(locExtFolder);