THere are various answers. Jewish prayers are in Hebrew because:
The Torah is written ... and read from ... in Hebrew.
For those who are not fluent in Hebrew, it is hard to read the Torah as the Torah scroll does not have nikkudot (pronunciation indicators).
The Jews received the Torah from God written in Hebrew, and significant numbers still read and study Torah in the original Hebrew to this day.
The Torah is not "read backward". The Hebrew alphabet goes from right to left as opposed to the Latin alphabet (that English uses) that goes from left to right. The Hebrew is read properly (right to left), which would make it appear to an English-speaker that the Torah is being read backwards when it is actually being read forwards.
See the attached Related Link.
The word 'Torah' is Hebrew.
This tool is called a Yad (יד)
The Hebrew Bible is used for prayer, study, and is read from on special ocassions such as Holidays and Shabbat. The Torah (the first part of the Hebrew Bible) is also read from on Mondays and Thursdays.
Torah (תורה) is the hebrew word for "instruction".
Greek became the only language besides Hebrew in which the Torah may be read (Talmud, Megillah 9a); and the Torah became accessible for the first time to non-Jews.
The Torah (the Five Books of Moses) is written in Hebrew. The Jews preserve the unchanged Hebrew text in their Torah scrolls. When you encounter the Torah in any other language, you're reading a translation. Other information The Talmud, which contains the Oral Torah is written in Hebrew and Aramaic.
The Torah is always now written in Hebrew. Long ago, the Torah was written in Aramaic, which is the ancestor of Hebrew.