Change browser language preference programmatically

Question

How can I change the browser language preference setting programmatically?

In the scenario at hand, I want to start the webapp in different languages. The app delivers the language as requested in the browser's language preferences, so I want to reconfigure the browser to English, perform some steps, then reconfigure the browser to a different language, and repeat those steps.

For automation, I'd use VBScript (using some COM server?) or QTP (which basically is just a VBScript client in this context), but I don't think this should matter.

Answer 1

If Ansgar does not disagree, I post the final result of researching this topic:

It seems there is no better way than updating HKCU\Software\Microsoft\Internet Explorer\International\AcceptLanguage, and (at least) broadcasting a WM_SETTINGCHANGE message via SendMessage so every process in the current session sees this change immediately.

See http://www.codeproject.com/Articles/20756/Change-Internet-Explorer-Proxy-Setting-without-R for good examples how to do that.

Answer 2

do what google does (rather used to do)....

add a language parameter to your query string from your app...

eg. google.com/?ln=id&from=myApp

on the sessionstart event handler.... determine the ln parameter of the request and redirect the request to the appropriate web page versions, provide an English fallback if their system language is not supported by your site. or Add a translation widget to your website (bing.com/translate)... to allow visitors to use machine/human generated translations.