I am the author of Transposh, and users have been complaining about pages that kept redirection loops.
I have discovered this to come from the fact that the clean permalinks function of Yoast was working even if it appeared unticked in the settings page.
Actually, the object had the "on" property for the settings looking at a stack trace.
This can be easily traced creating an on_wp_redirect trigger and making a trace.
If you need further info, I'll be happy to provide it.
Current solution - had to comment out the clean permalinks triggers you have added in the frontend-object file.