I am a female. If I want to recite a verse when there is non mahram around for dawah/educational purposes, should I say It in arabic and English as this is recommended? Or just in english as I am a female?

I know we can't pray loud in front on non mahram, hence my question.

You can recite as long as voice is not made intentionally to draw attention or in a way to appeal to men. But it is better to exercise caution in any case and be careful