$testStr = '{"success":true,"total":1,"data":{"data":{"translations":[{"translatedText":"Alessi% E6% 96% B0% E5% 93% 81% E7% 99% BC% E5% B8% 83% E3% 80% 80% E6% 99% 82% E5% B0% 9A% E5% AF% A6% E7% 94% A8% E5% 85% BC% E5% 82% 99"}]}}}';
// mb_convert_encoding($testStr, 'HTML-ENTITIES', "UTF-8");
print_R(utf8_decode(urldecode($testStr)));
$testStr = '{"success":true,"total":1,"data":{"data":{"translations":[{"translatedText":"Alessi% E6% 96% B0% E5% 93% 81% E7% 99% BC% E5% B8% 83% E3% 80% 80% E6% 99% 82% E5% B0% 9A% E5% AF% A6% E7% 94% A8% E5% 85% BC% E5% 82% 99"}]}}}';
// mb_convert_encoding($testStr, 'HTML-ENTITIES', "UTF-8");
print_R(utf8_decode(urldecode($testStr)));