I was being really dumb about how different languages were handled, should be better now :D

src/components/SettingsContent/CustomizationTab.astro

@@ -14,6 +14,7 @@ const themeList = [
 const languageList = [
   { name: "English", value: "en" },
   { name: "日本語", value: "jp" },
+  { name: "Français", value: "fr"}
 ];
 ---
 

src/i18n/ui.ts

@@ -1,9 +1,11 @@
 import en from "./en.json";
 import jp from "./jp.json";
+import fr from "./fr.json";
 
 export const defaultLang = "en";
 
 export const ui = {
   en,
   jp,
+  fr,
 };

src/i18n/utils.ts

@@ -3,7 +3,7 @@ import { ui, defaultLang } from "./ui";
 type LanguageKeys = keyof typeof ui;
 type TranslationKeys = keyof (typeof ui)[typeof defaultLang];
 
-export const STATIC_PATHS = [{ params: { lang: "en" } }, { params: { lang: "jp" } }];
+export const STATIC_PATHS = [{ params: { lang: "en" } }, { params: { lang: "jp" } }, { params: { lang: "fr" } }];
 
 function getLangFromUrl(url: URL) {
   // comma lol

src/pages/[lang]/settings.astro

@@ -382,14 +382,7 @@ export function getStaticPaths() {
         let currentLanguage = window.location.pathname.split("/")[1];
         // Do nothing.. because we're already on the page.
         if (value == currentLanguage) return;
-        switch (value) {
-          case "en":
-            window.location.href = "/en/settings/";
-            break;
-          case "jp":
-            window.location.href = "/jp/settings/";
-            break;
-        }
+          window.location.href = `/${value}/settings`;
         }
     }
     document.addEventListener("astro:after-swap", () => {

src/pages/index.astro

@@ -26,17 +26,7 @@ import { ViewTransitions } from "astro:transitions";
       if (currentLang) {
         try {
           let parsed = JSON.parse(currentLang).value;
-          switch (parsed) {
-            case "en":
-              redirect("/en/");
-              break;
-            case "jp":
-              redirect("/jp/");
-              break;
-            default:
-              redirect("/en/");
-              break;
-          }
+          redirect(`/${parsed}/`);
         } catch {
           localStorage.clear();
           window.location.reload();
@@ -45,6 +35,9 @@ import { ViewTransitions } from "astro:transitions";
         if (navigator.language.includes("ja")) {
           localStorage.setItem("alu__selectedLanguage", JSON.stringify({ value: "jp" }));
           redirect("/jp/");
+        } else if (navigator.language.includes("fr")) {
+          localStorage.setItem("alu__selectedLanguage", JSON.stringify({ value: "fr" }));
+          redirect("/fr/");
         } else {
           localStorage.setItem("alu__selectedLanguage", JSON.stringify({ value: "en" }));
           redirect("/en/");