There is a tradition called speculative grammar which existed from the 11th to the 13th century.
Leading scholars included, among others, Martin of Dace and Thomas of Erfurth.
In particular, philosophy of language studies issues that cannot be addressed by other fields, like linguistics, or psychology.
Major topics in the philosophy of language include the nature of meaning, intentionality, reference, the constitution of sentences, concepts, learning, and thought.
He claimed that there was a natural correctness to names.
To do this, he pointed out that compound words and phrases have a range of correctness.
He separated all things into categories of species and genus.
He thought that the meaning of a predicate was established through an abstraction of the similarities between various individual things. However, since Aristotle took these similarities to be constituted by a real commonality of form, he is more often considered a proponent of "moderate realism".
He criticized conventionalism because it led to the bizarre consequence that anything can be conventionally denominated by any name.
Hence, it cannot account for the correct or incorrect application of a name.