Judogi is european in origin.
Yes it is, Demetrio. Thank you for adding that fact to this thread. The Japanese school uniform is also of European origin. It's also interesting to see how close the aikidogi and hakama are to the school uniforms. White naval-inspired shirt with pleated-dark skirt.
Aikido is not a Japanese art. It is a world art.
From there, we could adjust the question in this topic, because the clothes really aren't Japanese.
Is it still Aikido if you add clothes, etiquette and other things from other parts of the world.
And the answer is, absolutely, because aikido, as it was established, was, and is, an ever-evolving, international confluence of influences.