I see what you did there and I disapprove. But seriously, I find Oxford commas so useful that I catch myself trying to use them in three other languages that don't have them.
May I ask which languages don’t have them? I can’t think of any European or Indian language that doesn’t use them (when writing with the Latin script). I may be wrong though.
Czech is one such example.
Oxford comma[1]? It's not used in Spanish and a flat out mistake in Russian, for example.