I'm working with a language file, with columns for different languages. My first row is the language names.
Is it possible to have the "A", "B", "C", etc as language names instead. That way, when I scroll I can still identify each column.
I would think it would be better to freeze the first row and by so, it will be visible all over the document when you scroll. But unfortunately, this function
You might try editing the document in Print View. The columns and rows are repeated as you scroll, which allows you to see what column/row you are on. Numbers does allow editing in print view. It's not exactly what you are looking for, but it's a solution.
Edit: And as you've answered your own question, it looks like this function is available at this moment.
As often happens, a couple of minutes after posting the question, I found a way to do this.
In the Inspector, (opt-cmd-i), in the Table Inspector tab click on the middle button of Headers and Footers. Select the option Freeze Header Rows and the first row will stick to the top.