Method setLocale

src/i18n.ts:18–20

* Set locale directly * @param locale - 'zh' or 'en'

(locale: 'zh' | 'en')

   * @param locale - 'zh' or 'en'
   */
  setLocale(locale: 'zh' | 'en') {
    this.currentLocale = locale;
  }

  /**
   * Get current locale