[Salvation]

http://usccb.org/bible/scripture.cfm?bk=Acts&ch=

Introduction to Acts — no mention of Greek language

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http://usccb.org/bible/scripture.cfm?bk=Luke&ch=

Introduction to Luke does mention Greek three times.

[Verginius Rufus]

I'm not sure what point you are trying to make. The whole New Testament was originally written in Greek. There are a few foreign words here and there but they are also written in Greek letters.

There is an ancient tradition that the Gospel of Matthew was originally written in Aramaic, but we don't have that and can't compare it to the Greek version.