Mrs Xue us constantly going between English and Chinese......and I have no idea how folks do it accidentally..... but that was not the first time I have seen that...the worst was when someone...who should not have been touching the system...managed to change the language, on a mainframe that was controlling the fire alarm and sprinkler systems, to German. You see he had taken a computer class in night school and wanted to practice.....Much running in circles and panicking ensued from the maintenance office that controlled it. I just went into settings and changed it back....still have no idea how he did that by accident....also never got any explanation why there was no password on this rather important system...or as why they allowed anyone, who just happened to be in front of the keyboard, in this unsecured area, access to it.