LightB has raised legitimate question. However the base of the question may not be correct.
No it is not a conspiracy by anyone if we recite few Arabic verses during the prayers. It is just a tradition. And guess what? Every religion in its outwards appearance is simply a collection of traditions. If you change any of the established traditions, you will "intentionally or unintentionally" end up starting a new sect/religion.
Having said that,
we all must realize that prayer is the most intimate moment with Allah and the individual who is praying. The language used during that prayer is immaterial except for a tradition.
Thus you may be asked to recite something in Arabic, Hebrew, Latin, Sanskrit, or Greek as per the tradition, so use the prescribed set of sentences in that language,
however
once you have used the "prescribed" words, you are free to use your favorite language to "augment" your communication with Allah. Since this is totally private matter between you and Allah, no one needs to know what you said and in what language.
For example, when you are in Sajda, and you have said the prescribed Arabic words three times, you don't have to end your stance and get up. Just continue on and talk to Allah. Have a "conversation", think as if He is right there in front of you and you are making a true sajda.
Thus, treat the prayer as a complete set of communication with Allah, and not just the Arabic part as per the tradition. Just enjoy being in contact with him for as long as you can. Do not treat the prayer as going through robotic motions.
Thanks for the explanation. It makes lot of sense.