Shopfinder special characters

I'm creating a shopfinder for a shop that I'm working at in Denmark. And thanks to your script this is possible, though I'm running into a problem when searching with special characters.

We have stores located in Denmark, Sweden; Netherlands and Norway so I want our customers to be able to search for cities, roads etc including characters for that specific country.

Example: We have a shop in Jönköping in Sweden, but I get the error “Geocode was not successful for the following reason: ZERO_RESULTS” when I search for this.

This error happens whenever I use special characters such as: æ ø å ö etc. Is it possible to allow these special characters?