I'm a bit surprised that Go and Rust weren't at least considered. I'd probably have looked into Deno in addition to Bun for the combined TS/JS assembly.

On the JS/TS side, you also have a few interesting tools to make interacting with XML a bit easier in practice (cheerio, for example). I'm not sure if the purpose in interacting with DOCX and to what extent manipulation is wanted/needed... it's a complex format to say the least, especially with references/embedding.

I've never been a Java fan, having preferred C# along the way, but I don't think I'd use either for something like this just because of the runtime size, if nothing else.