trying to use json_decode on utf8 json with MATLAB 2015

I have a big json file ([login to view URL]) that i would like to decode in matlab using json_decode. The decode fails because the file contains region names with some letters in local alphabet. to have the matlab json_decode function working, the special caracter could be removed. so for this project i need someone to write in matlab a script that process the json (or geojson) so that json_decode is possible. For testing purpose, i have attached a smaller version of the geojson file in [login to view URL] so you can test quicker : keep in mind that the project will be completed when [login to view URL] can be loaded properly, not just [login to view URL] here is a piece of code: fileName='[login to view URL]'; str = fileread(fileName); data = json_decode(str); and the error i get: Error using json_decode Parse error at character 1023491: perties": ...