We absolutely can invent a new language. It won't be as good as AI could make it.

For example, it could analyze a lot of data and catalog how certain sounds are perceived, analyze what we struggle with communicating today at international level, make certain needed distinctions, be more precise while simple/casual. Including alphabet and computer use/communication/programming. There's a lot of extra details AI can account for. Some that we don't even know or understand yet.

I personally think a modern and new global language could help the state of things. Like an actual well thought out subject, with no political abuse at all. Purely science driven.