No. You can begin praying and making dua in your own language. But, you should prioritize learning the minimum to be able to complete your prayers. Over time, learning Arabic is highly encouraged so you can understand the Qur’an and recite prayers as taught by the Prophet ﷺ.

• The Qur’an was revealed in Arabic (Qur’an 12:2).

• Scholars agree Arabic is not a requirement for becoming Muslim, but striving to learn it shows commitment to understanding Allah’s words.

Reference: Imam al-Nawawi (rahimahullah) noted that a new Muslim can pray in their own language until they learn enough Arabic for salah (Al-Majmu’ 3/395).