How to change the router's local Web administration interface language.
If the local Web interface in your Sputnik device comes up in Chinese, and it's a language you don't understand, here's how to get it back to English.
How the language got set to Chinese in the first place.
WIth Sputnik-default firmware (downloaded from http://www.sputnik.com/support/download/) the language is factory set to English. When you first log into the router's local web interface at 192.168.180.1, you are required to change the password as a security precaution. The language selection menu is on the same page though usually scrolled off the page - it is displayed, expanded, below.
If your web browser's default language is set to Chinese (which can happen with compromised browsers), DD-WRT detects this and will switch the language to Chinese. In other cases misconfigured browsers will auto-select the first menu option (Chinese - simplified). Since this option is not visible to the user the language selection may be changed without notice.
First, perform a 30-30-30 reset.
If you are using Sputnik-default firmware from http://www.sputnik.com/support/download, a 30-30-30 reset will clear all nvram values (the router's configuration file) and set the default language to English.
Please see: How to hard reset a router (30/30/30 reset)