Although this is an old question and the other answer doesn't seem to grasp what you are apparently trying to do, I may have an answer that works.
Although I am otherwise unsure if you have changed your IE to a newer version, nor if you are on Windows 7, XP or something else, the following works on Windows 7 - Internet Explorer 11 and apparently works on Internet Explorer 9 and 10. I am unsure about its use in Edge.
Try adding the following to your registry (copy the text and save it into a text document. Save the document as [name].reg).
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{3088BE79-CDC4-43F9-BB03-CFD2FC43B5C9}]
"DisplayName"="Google Switzerland (English)"
"FaviconPath"="C:\\Users\\[localuser]\\AppData\\LocalLow\\Microsoft\\Internet Explorer\\Services\\search_{3088BE79-CDC4-43F9-BB03-CFD2FC43B5C9}.ico"
"FaviconURL"="https://www.google.com/favicon.ico"
"SuggestionsURL_JSON"="https://suggestqueries.google.com/complete/search?output=firefox&client=firefox&hl=de&q={searchTerms}"
"ShowSearchSuggestions"=dword:00000001
"URL"="https://www.google.ch/#&q={searchTerms}"
Two things can prevent this from working.
- For whatever reason Registry Editor doesn't automatically change the [localuser] in the FaviconPath item into your computers username. This can be remedied by changing the [localuser] portion of the path to your PC Username.
- For whatever reason your computer doesn't like the {3088BE79-CDC4-43F9-BB03-CFD2FC43B5C9} string. Due to the way the registry sets these numbers (by using your username and the time/date as a seed) there may be some reason this particular number doesn't work for you.
- ! Problem Resolution ! -
If you are capable and comfortable with changing registry settings then go to HKCU\Software\Microsoft\Internet Explorer\SearchScopes\
and look for the entry that has your existing Swiss-German entry (the name in DisplayName will match the name you select under Manage Add-Ons > Search Providers). Replace the entries with ones from the Registry Entry above - In particular, the URL value.
Another way of doing this is to copy the key name for the entry (Right Click on the Key name eg.{27YB9U6S-...} > Select [Rename] > Right Click and Copy / Press [CTRL] + [C] and Paste it in the above Registry Entry (Under the Key Path and the Favicon Path {} sections). From there, running it as a .reg should set it properly.
If you wish to make this change for all users of the PC (not just the active one) change the key path from
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{3088BE79-CDC4-43F9-BB03-CFD2FC43B5C9}
to
HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\SearchScopes\{3088BE79-CDC4-43F9-BB03-CFD2FC43B5C9}
When you do a search from the URL Bar in IE 9 - 11, it will now search under Google CH (English results).