Hi,
The CA WA DE can be installed on non-English OS. There is no localization for CA WA DE. The Desktop Client will pick up some of the "internationalization" from OS. With CA WA Agent 11.3 SP7 or newer 11.4 the file or path name in non-ASCII characters may also work in command and other jobs.
Screenshot of Desktop Client on Hindi OS.
Thank you,
Nitin Pande
CA Technologies