Add query parameters to avoid JSON warning

[sabativi]

I keep having there errors :

with more than 20 translations it is very annoying in dev

By adding type=json, I have no warning, #148 and #126 had this problem without any way to reproduce it

In postman result is text with ?json

whereas with type=json

[zendranm]

@sabativi good catch, I reproduced the error and your fix works correctly.