use fallbackLng as default lng

i18next · Dec 11, 2020 · ad88092 · ad88092
1 parent ba564b3
commit ad88092
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/i18next.js b/src/i18next.js
@@ -120,6 +120,10 @@ class I18n extends EventEmitter {
       });
     }
 
+    if (this.options.fallbackLng && !this.services.languageDetector && !this.options.lng) {
+      const codes = this.services.languageUtils.getFallbackCodes(this.options.fallbackLng)
+      if (codes.length > 0 && codes[0] !== 'dev') this.options.lng = codes[0]
+    }
     if (!this.services.languageDetector && !this.options.lng) {
       this.logger.warn('init: no languageDetector is used and no lng is defined');
     }