Can a site with low-quality AI content recover and be indexed if I rewrite everything manually and switch languages?

Hey everyone,

A while ago I started a small niche site mostly as an experiment to see how AI content would perform with SEO. The content was low quality and mostly AI-written in English.

The site is not being indexed (Crawled – currently not indexed but I really like the domain and I spent a lot of time on the design/UX, so I’d prefer not to throw it away. So, I’m considering starting over from scratch but I have some questions:

1. Is it possible for this domain to recover and be fully indexed if I rebuild it with high-quality, original (non-AI) content, even though it previously had low-quality AI content?
2. Does switching the main content language (from English to Portuguese) cause any extra issues for indexing or trust, or is Google fine with that as long as the content is good and consistent?
3. Would you recommend keeping the same domain and cleaning everything up or starting fresh with a new domain to avoid any potential history attached to this one?

Thanks in advance!