I don’t need this, though I see how it’d be useful. However, your Show HN title is clickbaity in the worse sense: “could be game changer” is meaningless and does not inspire confidence, those words would be better spent clarifying what the tool does. At first I understood it as translating JSON to other formats, not translating the text itself.
The website does a good job of explaining what this is, but the Show HN title (and other marketing you do in this vein) may end limiting your reach.