Assalaum alaikum sister,
We all know that we need to recite Quran in our prayers, not any words of our choice. It is evident from the verses below that our Creator wants us to understand His book in the language that He has chosen for His message.
Alif, Lam, Ra. These are the verses of the clear Book.
Indeed, We have sent it down as an Arabic Qur'an that you might understand.
Quran, 12:1-2
There is a message within those words, that we as Muslims are required to learn the language that God has chosen for His last message. Allah is the wisest and does not want us to get lost in translation like the people of the book (Jews and Christians). Also, different parts of Quran should be recited in each Rak'ah (round/circle?) and if we do not stick to the Arabic then we would be reading the translation in English for example. This will produce many obstacles, and I will give here two.
First, not everyone would agree on the translation of every verse which will prevent them from praying together (in congregation) as different individuals will disagree with each others translation.
The second obstacle would be that it would be extremely hard to memorise the translation of the entire Quran in any other language while memorising Quran in its orignial language is a miracle in itself and made easy by Allah to memorise, a fact that is stated in several verses of Quran.
Allah almighty mentions the relationship of Quran and Arabic language many times so that it is emphasised that Quran be learned in its original form. Some more versses are as follows:
And thus We have sent it down as an Arabic Qur'an and have diversified therein the warnings that perhaps they will avoid [sin] or it would cause them remembrance. Quran, 20:113
[It is] an Arabic Qur'an, without any deviance that they might become righteous. Quran, 39:28
A Book whose verses have been detailed, an Arabic Qur'an for a people who know, Quran, 41:3
And if We had made it a non-Arabic Qur'an, they would have said, "Why are its verses not explained in detail [in our language]? Is it a foreign [recitation] and an Arab [messenger]?" Say, "It is, for those who believe, a guidance and cure." And those who do not believe - in their ears is deafness, and it is upon them blindness. Those are being called from a distant place. Quran, 41:44
And thus We have revealed to you an Arabic Qur'an that you may warn the Mother of Cities [Makkah] and those around it and warn of the Day of Assembly, about which there is no doubt. A party will be in Paradise and a party in the Blaze. Quran, 42:7
Indeed, We have made it an Arabic Qur'an that you might understand. Quran, 43:3
The teachings of Islam in general are such that in practice, it leads to the unification of people by faith and eleminates other differences whether language, colour etc so that it is made clear that the only identity that is important to Allah is a Muslim's faith and it is the faith that should be more pronounced in a Muslim individual first and most. I understand it will be hard for you in the beginning, but Allah willing, it will become very easy for you if you try.