Hi, 

I tested this on my current dev build 68.0.3410.0 and I can reproduce partially.

It does start reading "Zero ..." while the "Save file as" dialog is opening, but once it loads it reads "File name Edit text", so it sounds like:
"Zero file name, edit text." which isn't ideal.

Your screenshot suggests that there was an error when loading the "Save file as" dialog which never finished loading.

I'll try to workaround this reading "Zero width no break space", and/or report to ChromeVox team.

Lastly thanks for sharing the toddler detail, it put a smile on my face. :-)

I've reported to ChromeVox team too:  crbug.com/838020 

But I'm working around on File Manager application.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/10dc10e778bdab3a0019aba329fa419be1f464bd

commit 10dc10e778bdab3a0019aba329fa419be1f464bd
Author: Luciano Pacheco <lucmult@chromium.org>
Date: Tue May 08 03:13:58 2018

Remove unicode char zero width space from title

This fixes the issue where ChromeVox was reading "Zero width no break
space" while File Manager or "Save as" dialog was loading.

This unicode char was added by the following patch, but without a clear
reason:
https://chromium.googlesource.com/chromium/src/+/9485ad7b2a08306e23e9980d73a0eaa73da98610%5E%21/#F10

Bug:  835789 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I7cc698071ab0c42df4f208e92a2c3cf0fb15cb0a
Reviewed-on: https://chromium-review.googlesource.com/1034415
Reviewed-by: Naoki Fukino <fukino@chromium.org>
Reviewed-by: Sasha Morrissey <sashab@chromium.org>
Commit-Queue: Luciano Pacheco (SYD) <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556666}
[modify] https://crrev.com/10dc10e778bdab3a0019aba329fa419be1f464bd/ui/file_manager/file_manager/main.html

The patch submitted on the previous comment fixes the issue.

It'll take some time to be finally available to final users, probably on version 69.