@criver @m0nciar
Very technically you are right. But if someone actually intended to do harm (say, a new, little publisher who has no fame yet and thus seeks other ways of becoming big), a credits page in a chapter claiming that they received donations
to do the chapter would mean that the money is legaly bound to the work of translating: it's
credited as such.
EDIT: To clarify: you can ask for donations and you can take donations. But they only remain legally as donations as long as they are not a requisite for you to do work. If you do something only if you are donated to do it, then you are doing remunerated work, should be taxed as such, and all the other BS that comes with it.