זה נשמע כמו הַרִי פּוׂטֶר
הַמְּכַשְּׁפִים הִתְחַתְּנוּ עִם הַמְּכַשְּׁפוֹת
What is the difference between a magician and a wizard?
If you mean fairytale magicians vs wizards, it really depends on the series. Some series only have one or the other, or the terms are synonymous. But generally:
Magicians are users of magic.
Wizards are those with training in the use of magic.
(Like cook vs chef).
Who would oversee weddings like those?!
Is it wrong: Married with?
Yes, wrong in English.
הַמְּכַשְּׁפִים הִתְחַתְּנוּ עִם הַמְּכַשֵּׁפוֹת.
So, female wizards are witches and not wizards? And male witches are wizards and not warlocks?
Yes, all these nouns are usually gendered in English. But warlocks are men.
Is it wrong in English to say: the wizards married the witches?
No, this is possible too. You could also use נָשָׂא לְ־ for to marry someone.