Java picks up the language from the locale setting of the machine it is running on, but that doesn't look like a different locale setting so much as something badly scrambled. Which REW installer did you use? Could try the offline version if you didn't use that, it includes its own Java runtime (in case there is any configuration issue with the version of Java on the PC).
Deleted java and restarted computer. installed latest java and tried again with the online version with same results but stopped before the install because it was half scrambled. Then tried again with online version and its scrambled too... its a new 2016 computer dell7000 with windows 10 and a i5 processor
I'm starting to think its a virus but I ran the scan multiple times and nothing shows up.