Kielitieteellisestä
Kielitieteellisestä is a Finnish adjective meaning "linguistic" or "of linguistics." It is the essive case of the noun kielitiede, which translates to "linguistics." The essive case in Finnish indicates a state, role, or function. Therefore, when something is described as kielitieteellisestä, it means it pertains to or is in the nature of linguistics.
For example, a study might be described as a kielitieteellisestä tutkimuksesta, meaning a "linguistic study" or