B2B-88: add starter kit structure and elements

lib/i18n/i18n.settings.ts

@@ -0,0 +1,62 @@
+import { createI18nSettings } from '@kit/i18n';
+
+/**
+ * The default language of the application.
+ * This is used as a fallback language when the selected language is not supported.
+ *
+ */
+const defaultLanguage = process.env.NEXT_PUBLIC_DEFAULT_LOCALE ?? 'en';
+
+/**
+ * The list of supported languages.
+ * By default, only the default language is supported.
+ * Add more languages here if needed.
+ */
+export const languages: string[] = [defaultLanguage];
+
+/**
+ * The name of the cookie that stores the selected language.
+ */
+export const I18N_COOKIE_NAME = 'lang';
+
+/**
+ * The default array of Internationalization (i18n) namespaces.
+ * These namespaces are commonly used in the application for translation purposes.
+ *
+ * Add your own namespaces here
+ **/
+export const defaultI18nNamespaces = [
+  'common',
+  'auth',
+  'account',
+  'teams',
+  'billing',
+  'marketing',
+];
+
+/**
+ * Get the i18n settings for the given language and namespaces.
+ * If the language is not supported, it will fall back to the default language.
+ * @param language
+ * @param ns
+ */
+export function getI18nSettings(
+  language: string | undefined,
+  ns: string | string[] = defaultI18nNamespaces,
+) {
+  let lng = language ?? defaultLanguage;
+
+  if (!languages.includes(lng)) {
+    console.warn(
+      `Language "${lng}" is not supported. Falling back to "${defaultLanguage}"`,
+    );
+
+    lng = defaultLanguage;
+  }
+
+  return createI18nSettings({
+    language: lng,
+    namespaces: ns,
+    languages,
+  });
+}