The original is almost all in Hebrew.
The temporary language was used for most of the Old Testament books.
Yes. It's the language in which the Tanakh ("old testament") was originally written. It has been used continuously since then as the language of Jewish prayer and study, and is the most widely spoken language in modern Israel.
Latin
Most likely God is mentioned in the Old Testament in what he said and did for His people.
There is no strange language used in the Bible.
The Gospel of Matthew quotes the Old Testament the most among the four Gospels in the Bible.
The Old Testament was written in Hebrew, but during the third and second centuries B.C. the Old testament was translated into the Greek Septuagint as the Hebrew language was dying out. The people needed the Scriptures in the tongue they understood.
God.
The Old Testament of the Bible was translated from Hebrew to English and the New Testament from Greek.
God
It was originally written in Hebrew.
The psalms are in the old testament, and the most quoted psalm is psalm 23.