Yes, in shaa Allah, though one must try his level best to learn Arabic, at least to read it.

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This is up to Allah to judge them as their prayer and fasting would admit them to paradise while not wearing hijab will admit her to hell. She might spend sometime in hell until she is purified from her sins and then admitted to paradise.

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Zakat has to be in cash or they authorize you to buy them something specific.

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Your parents have rights over you and so does your wife. You did nothing wrong in supporting your wife as long as you were not disrespectful or rude with your mother. Your wife has the right to a separate accommodation in Islam. Work hard on getting her that. https://www.youtube.com/watch?v=zehAWR9hQbE

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