fix: obsidian language not set in English, Chinese and Japanese

src/lang/I18n.ts

@@ -8,10 +8,42 @@ export const I18n: {[key: string]:any} = {
 	ja,
 };
 
-export const I18nConfig = (lang: string): any => {
-    return I18n[lang];
-};
+class I18nManager {
+	private currentLanguage: string;
 
-const storedLanguage = window.localStorage.getItem("language");
+	constructor() {
+		this.currentLanguage = this.detectLanguage();
+	}
 
-export const i18nConfig = I18n[storedLanguage || window.navigator.language.split('-')[0] || "en"];
+	// return the language to use
+	private detectLanguage(): string {
+		const storedLanguage = window.localStorage.getItem("language");
+		if (storedLanguage && this.isLanguageSupported(storedLanguage)) {
+			console.log(`Using stored language: ${storedLanguage}`);
+			return storedLanguage;
+		}
+
+		const browserLanguage = window.navigator.language.split("-")[0];
+		if (this.isLanguageSupported(browserLanguage)) {
+			console.log(`Using browser language: ${browserLanguage}`);
+			return browserLanguage;
+		}
+
+		// Default to English if no match is found
+		console.log("Using default language: en");
+		return "en";
+	}
+
+	private isLanguageSupported(lang: string): boolean {
+		return Object.prototype.hasOwnProperty.call(I18n, lang);
+	}
+
+	// Get the i18n configuration for the current language
+	public getConfig(): any {
+		return I18n[this.currentLanguage];
+	}
+}
+
+export const i18nManager = new I18nManager();
+
+export const i18nConfig = i18nManager.getConfig();