https://bugzilla.wikimedia.org/show_bug.cgi?id=5309

--- Comment #40 from Minh Nguyễn <m...@1ec5.org> ---
For Vietnamese, 27 of the images contain a piece of tofu instead of a second
word; 2 images contain more than one piece. It’s odd, because this font clearly
supports the Vietnamese half of Latin Extended Additional. The high distortion
is problematic and probably unnecessary, because Vietnamese OCR is still pretty
rudimentary, with little support for diacritics. As it is, though, a different
font may help with many of the following legibility challenges:

ú or ủ?
https://www.dropbox.com/sh/i2af7xvn4y593gc/v_jkVCy5Xg/captchas/vi/image_6876ca11_cc6e08a95ea5b935.png

ẽ or ế?
https://www.dropbox.com/sh/i2af7xvn4y593gc/rfc7TwizAo/captchas/vi/image_432bfc9d_d02d9707bcb0a02b.png

If I didn’t know this font used two-story a’s, I’d see ã instead of ỗ:
https://www.dropbox.com/sh/i2af7xvn4y593gc/CGUSde4hfC/captchas/vi/image_5cbb4b12_976cd14e4e332a23.png

ú or ứ?
https://www.dropbox.com/sh/i2af7xvn4y593gc/Svdiq4ZLS5/captchas/vi/image_c90d4c3d_6b4e7a877b3e79dc.png

d or đ?
https://www.dropbox.com/sh/i2af7xvn4y593gc/Ah4yviImWT/captchas/vi/image_ae9020dd_0a618ab7494104fd.png

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