What is required of one who has committed religious errors and uttered words of disbelief out of ignorance, and has regretted and repented for that? Does that affect the marriage contract? What is the ruling on pronouncing the name "Abdullah" by dropping the "ha" in Morocco?

Ignorance of conditions and pillars removes sin, but it does not absolve one of responsibility or waive the obligation according to the majority of scholars. Therefore, one must make up for missed prayers. However, Sheikh al-Islam Ibn Taymiyyah held that the ignorant person is excused and does not have to make up prayers, citing as evidence that the Prophet (peace be upon him) did not command the one who prayed incorrectly to make up what he missed, nor did he command Mu'awiyah ibn al-Hakam to make up his prayer when he spoke during it out of ignorance.

As for ignorance of what takes one out of Islam: If the action is among those evident matters that are not hidden from anyone, such as cursing God or insulting the Qur'an, then this is apostasy that necessitates repentance, regret, and cessation. However, regarding phrases that are obscure and spoken by common people out of ignorance, the inclination of the mufti is that ignorance is an excuse, because the mufti is commanded to lean towards the opinion that does not lead to excommunication.

Accordingly, one must perfect their repentance and seek forgiveness for what has passed, and there is no need to renew the marriage contract. And there is nothing wrong with not pronouncing the letter 'H' in the word "Abdullah" in some dialects.