dictionary and copyrights
It is possible to write dictionaries because nobody owns the words they contain, and that's why lexicographers copy one another. Words, like the letters of an alphabet, belong to the public domain by their very nature.
Now, what about neologisms (newly coined terms)? Do you think a coinage belongs to its creator? If it did, nobody would have the right to use it without the expressed permission of the creator and, possibly, having to pay a fee whenever the word is entered in a text. This of course would keep the coinage out of public usage, hence make it pointless. In brief, to me, just like old words, coinages belong to the public domain.