A DNS Server
DNS
which is most likely to be another application of x-rays
names of references
the names of references
Most likely send an email and inquire about such a thing.
All languages have words that are unique to one language. Certain words do not translate. Idioms do not translate well either.
names of friends
The likely word is "gratefully" (thankfully).(There is a rarely-used adverb guardfully of uncertain application, likely watchfully.)
Missing questions on an application, and bad spelling, is likely to affect your job prospect.
future plans
Family background
The likely word is application (a use, a request, or applying something).
You most likely wouldn't, as most speakers are bilingual in Englisn.