Force 🇺🇸 when we cannot provide a translated instruction (#535)
Force 🇺🇸 when we cannot provide a translated instruction (#535)

* Force 🇺🇸  when we cannot provide a translated instruction

* Allow fallback to osrm-text-instruction languages

* Dont hard code language list

Project-OSRM/osrm-text-instructions.swift,Project-OSRM/osrm-text-instructions.swift,Project-OSRM/osrm-text-instructions.swift