If you do not wish to use the language settings auto-detection, you can force override the UI to use a specified translation.

This setting is controlled via a setting localizeOptions in vvDefines.js as shown below. The vvDefines.js file is located in the \virtualviewer\js\.

// Remove the backslashes (//) before the word language and replace
// the values zz with the letter codes of the language file you want to
// force.
// Have the translation file available for reference.

localizeOptions: {
//language: "zz",
pathPrefix: "resources\locale"