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For Gutenberg, there are a few. https://runeberg.org/ is my local version.

For Standard Ebooks, there have definitely been some attempts in the past, but getting traction has historically been difficult it seems. I’m pretty sure I saw a Spanish equivalent at one point with a decent sized library though.

For Japan/Japanese there is Aozora. They have out of copyright and public domain books.

Any newly public Japanese texts?

There are none. Japan is in the midst of a 20‐year public domain drought (2019–2038), like the US from 1999–2018 and Canada from 2023–2042, because they extended the copyright duration from life+50 to life+70 due to pressure from the EU.

Aozora Bunko does receive new public domain works, but only ones whose copyrights had already expired by 2018.

Thanks

For Italian there is liber liber but I don't like how it is run at all. They claim copyright for the cleaning process to produce the ebook: this basically is both illegal in Italy, afaik, and ruins the whole goal of the project.