Unicode defines a number of codepoints as having Ambiguous Width. These are characters whose width resolves differently according to context that is typically absent from the monospaced world of the terminal.
WezTerm will by default treat ambiguous width as occupying a single cell.
treat_east_asian_ambiguous_width_as_wide = true WezTerm will treat them
as being two cells wide.
Note that changing this setting may have consequences for layout in text UI applications if their expectation of width differs from your choice of configuration.