DFES JasonXml doesnot handle 2-byte characters

While using web_reg_save_param_xpath with JsonXml DFES; the 2-byte characters the the response are not handles properly e.g.

Response JOSN

"TranslatedTemplateName": "名前 名前 名前 名前",

Converted to 

<pair type="str" name="TranslatedTemplateName">Ã¥&#144;&#141;Ã¥â\x80°&#141; Ã¥&#144;&#141;Ã¥â\x80°&#141; Ã¥&#144;&#141;Ã¥â\x80°&#141; Ã¥&#144;&#141;Ã¥â\x80°&#141;</pair>

Is there a setting to handle this?