1 files changed, 18 insertions, 1 deletions
diff --git a/test-client/locale.ts b/test-client/locale.ts
index 61d083b4..b584be3c 100644
--- a/test-client/locale.ts
+++ b/test-client/locale.ts
@@ -1,6 +1,14 @@
 
+const LANGUAGES = [
+    "ar", "de", "en", "es", "eu",
+    "fi", "fr", "he", "ja", "nl",
+    "pl", "pt", "to", "tr",
+    "zh_Hans", "zh_Hant",
+]
+
 let TR: { [key: string]: string } = {}
-export async function init_locale(lang: string) {
+export async function init_locale(lang?: string) {
+    if (!lang) return await init_locale(select_language())
     const res = await fetch(`/locale/${encodeURIComponent(lang)}.json`, { headers: { "Accept": "application/json" } })
     if (!res.ok) throw new Error("language pack download failed");
     TR = await res.json()
@@ -12,3 +20,12 @@ export function tr(key: string, ...args: string[]): string {
         s = s.replace(/%(s|i)/ig, () => args.shift() ?? "[not provided]")
     return s
 }
+
+function select_language(): string {
+    const plang = (new URLSearchParams(globalThis.location.hash.substring(1))).get("lang")
+    if (plang) return plang
+    const navlang = navigator.language.split("-")[0] ?? "en"
+    if (navlang in LANGUAGES) return navlang
+    console.warn("fallback language selected");
+    return "en"
+}