Translators: This is a checkbox which enables or disables
the pango font fallback. If font fallback is off, only the
font selected in the font menu is used to display emoji
(if possible, this may not always work, sometimes other fonts
may be used even if font fallback is off).
If font fallback is on, other fonts will be tried for emoji
or parts of emoji sequences which cannot be displayed in the
selected font.
enrico