At the time this issue is being filed, Zed is at commit 78d587d.

A community zync user inquired about this functionality:

Do you know how to import semi-columns based CSV files in Zui (and zq, Zed)? In the French language .csv text files we commonly use ';' as a field separator instead of ',' because we use ',' as a decimal separator for floating point numbers.

It looks like the Go CSV library Zed currently uses has options that would allow the selection of alternate separators, but Zed/Zui don't yet offer ways to invoke such options.

I also asked the user the context in which they primarily imagined using the functionality, since I expect deciding how it's invoked may be more work than leveraging the option. The response:

Zui app mostly, as this problem mostly arises when trying to transfer Excel files into Zui using CSV.