Add query parameter locale to Wowhead Tooltip url

ui/core/proto_utils/database.ts

@@ -24,6 +24,7 @@ import { EquippedItem } from './equipped_item.js';
 import { Gear, ItemSwapGear } from './gear.js';
 import { gemEligibleForSocket, gemMatchesSocket } from './gems.js';
 import { getEligibleEnchantSlots, getEligibleItemSlots } from './utils.js';
+import { getLangId } from '../../i18n/locale_service';
 
 const dbUrlJson = '/mop/assets/database/db.json';
 const dbUrlBin = '/mop/assets/database/db.bin';
@@ -400,7 +401,7 @@ export class Database {
 		return Database.getWowheadTooltipData(id, 'spell', { signal: options?.signal });
 	}
 	private static async getWowheadTooltipData(id: number, tooltipPostfix: string, options: { signal?: AbortSignal } = {}): Promise<IconData> {
-		const url = `https://nether.wowhead.com/mop-classic/tooltip/${tooltipPostfix}/${id}?lvl=${CHARACTER_LEVEL}&dataEnv=${WOWHEAD_EXPANSION_ENV}`;
+		const url = `https://nether.wowhead.com/mop-classic/tooltip/${tooltipPostfix}/${id}?lvl=${CHARACTER_LEVEL}&dataEnv=${WOWHEAD_EXPANSION_ENV}&locale=${getLangId()}`;
 		try {
 			const response = await fetch(url, { signal: options?.signal });
 			const json = await response.json();

ui/i18n/locale_service.ts

@@ -1,6 +1,8 @@
 // Locale service for WoWSims
 // Single source of truth for language settings
 
+import { getLangId as getWoWHeadLangId } from './wowhead_locale_service';
+
 const STORAGE_KEY = 'lang';
 
 export const supportedLanguages: Record<string, string> = {
@@ -16,6 +18,14 @@ export const getLang = (): string => {
 	return setLang('en');
 };
 
+export const getLangId = (): number => {
+	const storedLang = localStorage.getItem(STORAGE_KEY);
+	if (storedLang && storedLang in supportedLanguages) {
+        return getWoWHeadLangId(storedLang);
+	}
+	return 0;
+};
+
 export const setLang = (lang: string): string => {
 	if (lang in supportedLanguages) {
 		localStorage.setItem(STORAGE_KEY, lang);

ui/i18n/wowhead_locale_service.ts

@@ -0,0 +1,21 @@
+const DEFAULT_LANG_ID = 0;
+
+//refer to Wowhead locale Ids
+const LANG_ID_MAP: Record<string, number> = {
+  ko: 1,
+  fr: 2,
+  de: 3,
+  cn: 4,
+  es: 6,
+  ru: 7,
+  pt: 8,
+  it: 9,
+  tw: 10,
+  mx: 11,
+} as const;
+
+// Map language codes to numeric Id
+export const getLangId = (code: string): number => {
+    const normalized = code.toLowerCase();
+    return LANG_ID_MAP[normalized] ?? DEFAULT_LANG_ID;
+};