Warum, wieso, weswegen, weshalb - What’s the difference between these words?

[wanton meadow]

There isn't one. They are all synonyms. Maybe there technically is a slight difference, but in actuality they are all used identically.

Note that „weshalb“ and „weswegen“ are less common in modern German, but that's not to say that people won't use them, it's just that they sound a bit ‘fancy’

[runic lava]

^ what they said. i also found this

[pine sable]

wow, even the admin replied, thank you both!