I am not an Arabic speaker. I have been going to the mosque for a while and learning Arabic there. I found out a couple of years ago that I was reading surah al fatiha in salah wrong. It was just something I coincidentally noticed by myself. I was pronouncing ٱهْدِنَا ٱلصِّرَاطَ ٱلْمُسْتَقِيمَ as ٱهْدِنَا ٱلصِّرَاطَ ٱلْمُسْتَقِينَ. I don’t remember exactly when this was and which salahs it regards. I fixed up in it but after a while forgot and accidently read it wrong again. Ever since then I learned to correct it but had no idea any of this could invalidate islam. I can’t understand how accidents like these, which I purposely did not do, invalidates years of salah. I may not speak arabic but I have learned quran well enough to not make this mistake. I can’t figure out what to do from now on and would love advice on it. I only prayed with a sincere heart and have suffered mentally from this mistake. Please help me!