That would make a degree in French a STEM degree, not Liberal Arts. Obviously, nearly all fields involve data recording, analysis and interpretation to different extents, and the skills needed to perform those actions are basic in STEM disciplines, but they are not STEM intensive. Conjugating verbs is a way of organizing and recording communication data in the purest sense of the word. But I don't think it makes one a scientist, a medical doctor, an engineer or mathematician.
* corrected "subjugating" to "conjugating" verbs, because had I a senior moment and JUSTICE!!1!