Add en.json
Add en.json

Fixes #620

xcv58/gitbook,intfrr/gitbook,iflyup/gitbook,haamop/documentation,OriPekelman/gitbook,boyXiong/gitbook,wewelove/gitbook,ferrior30/gitbook,a-moses/gitbook,FKV587/gitbook,guiquanz/gitbook,hongbinz/gitbook,mruse/gitbook,alex-dixon/gitbook,jocr1627/gitbook,CN-Sean/gitbook,kamyu104/gitbook,grokcoder/gitbook,JohnTroony/gitbook,palerdot/gitbook,sunlianghua/gitbook,escopecz/documentation,snowsnail/gitbook,mruse/gitbook,rohan07/gitbook,tshoper/gitbook,2390183798/gitbook,ferrior30/gitbook,athiruban/gitbook,iamchenxin/gitbook,vehar/gitbook,JohnTroony/gitbook,jasonslyvia/gitbook,hujianfei1989/gitbook,tzq668766/gitbook,a-moses/gitbook,mautic/documentation,kamyu104/gitbook,npracht/documentation,thelastmile/gitbook,tshoper/gitbook,jocr1627/gitbook,GitbookIO/gitbook,gaearon/gitbook,gencer/gitbook,shibe97/gitbook,megumiteam/documentation,gdbooks/gitbook,sudobashme/gitbook,xxxhycl2010/gitbook,snowsnail/gitbook,sudobashme/gitbook,nycitt/gitbook,haamop/documentation,iamchenxin/gitbook,palerdot/gitbook,tzq668766/gitbook,qingying5810/gitbook,boyXiong/gitbook,rohan07/gitbook,sunlianghua/gitbook,ZachLamb/gitbook,2390183798/gitbook,qingying5810/gitbook,justinleoye/gitbook,FKV587/gitbook,guiquanz/gitbook,xxxhycl2010/gitbook,youprofit/gitbook,gdbooks/gitbook,grokcoder/gitbook,youprofit/gitbook,lucciano/gitbook,iflyup/gitbook,CN-Sean/gitbook,athiruban/gitbook,intfrr/gitbook,wewelove/gitbook,webwlsong/gitbook,npracht/documentation,ryanswanson/gitbook,ZachLamb/gitbook,webwlsong/gitbook,mautic/documentation,jasonslyvia/gitbook,gaearon/gitbook,xcv58/gitbook,strawluffy/gitbook,nycitt/gitbook,shibe97/gitbook,bradparks/gitbook,megumiteam/documentation,gencer/gitbook,thelastmile/gitbook,switchspan/gitbook,alex-dixon/gitbook,hongbinz/gitbook,minghe/gitbook,hujianfei1989/gitbook,lucciano/gitbook,OriPekelman/gitbook,minghe/gitbook,escopecz/documentation,bradparks/gitbook,vehar/gitbook,justinleoye/gitbook,switchspan/gitbook