I agree with Justin Pasher, but if you look a little lower in the text of the
program "apt-mirror",
you can see a similar code, but for all 3 archive formats:
sub find_dep11_files_in_release
...
if ( $filename =~
m{^$component/dep11/(Components-${arch}\.ml|icons-[^./]+\.tar)\.(gz|bz2|xz)$} )
So maybe better to add a line:
if ( $filename =~ m{^$component/i18n/Translation-[^./]*\.(gz|bz2|xz)$}
)
In order not to think about it anymore, especially since all the rest of the
text supports all 3 formats.