Last modified: 2012-07-28 17:20:44 UTC
When using the "?uselang=zxx" URL parameter, the page contents are in the wanted language zxx, but automatic error messages appering and disappearing dynamically while one types in form fields are in the user-language. This is both bewildering and of course not what users expect. See also Bug 37157 comment 3 for a specific example.
Looks like a dupe? *** This bug has been marked as a duplicate of bug 31961 ***