And we Muslims know that on the day of judgement we will be asked questions in Arabic.
My friend, know this: "NEVER" there was any verse or hadith that says that people will be asked in Arabic
and NEVER there was any verse or hadith that says that Arabic language is superior than any other language
Islam and our prophet are far more noble to be nationalist or giving superiority to any race or language or a culture
our prophet's message is dedicated to the human race not to the small Arab race
Prophet Muhammad صلى الله عليه وسلم had used all his effort and time to demolish nationalism and fighting being intolerant towards those whom are different from you. If you read his last peach you would know that he was not nationalist and Biased to any race
as for the OP's question
I'm not here as an arab, I'm here as a muslim so please don't misunderstand me and think that I'm here to defend my language
there is a hadith or a saying that says "دين يسر لا عسر"
it means " A religion of ease, not hardship "
Allah does not force you or need you to believe or worship him and practice his religion
The prayer is very essential and very strict. you are supposed to do it just like our prophet did it
prayer, hajj we are supposed to do it exactly like our prophet did it
other than these you should use your own language
and again please don't take it that I'm here as an Arab
salam