VRChat supports a range of languages, but only some worlds are multilingual. Having an example prefab that offers a UI with language options and a script that then goes over UI strings and replaces them would be great. Even better if it would load the strings from a JSON file or URL. It could use the SDK to detect game language and remember any overrides through persistence.
Currently I'm having problems finding a community made solution and I know world authors implement this manually.
A prefab like this would incentivize world creators to implement multilingual support and seek translation contributions in their communities. Multilingual support should be considered a fundamental feature and I believe this fact makes it a great candidate for a new example prefab for Example Central.