All praise be to Allah, and may his peace and blessings be on the last and best prophet and messenger, Muhammad.

Tilawat al-Quran must be done in Arabic. It is permissible and encouraged to read the translation outside the prayer.
Inside the prayer, you may hold the Quran and make tilawat of the Arabic and look at the translation, to understand what you are reading, without speaking any words in the foreign language.

Allah knows best.