Good fall back languages for English would be any of the Germanic languages or Romance languages. As a native American, I also would agree with this article's listing of languages that are more easily understood by my brain:
1. Afrikaans 2. Danish 3. French 4. Italian 5. Norwegian etc.
9 easy languages for English Speakers. https://matadornetwork.com/abroad/9-easy-languages-for-english-speakers-to-l...
-Thad +ThadGuidry https://www.google.com/+ThadGuidry