What is the ruling on a man marrying a woman who used to pray silently without moving her lips or tongue, and is her previous prayer valid?

The prayer is not valid by merely passing Al-Fatiha through the heart without moving the tongue. Whoever prays in such a manner, their prayer is invalid and they must make it up. Some scholars are of the opinion that whoever omits a pillar or a condition due to ignorance is not required to make it up. This view can be adopted by those for whom making up the prayers is difficult, but the more cautious approach is to make them up. This error does not invalidate the woman's marriage contract, because she is a Muslim who was ignorant, not an apostate.