Translations with single quotes prevent grub from booting

[Jaume Delclòs Coll]

When you generate a grub configuration file using grub-mkconfig and your 
system's language is set to Catalan, the file generated has a problem. 
It contains the following two lines for every linux entry, which prevent 
you from booting that entry:
echo    'S'està carregant el Linux (name of kernel here) kernel ...'
echo    'S'està carregant la ramdisk inicial ...'

(Of course replacing "(name of kernel here)" with the name of the kernel)
The problem is obviously that apostrophe, which is required by Catalan 
grammar.
I tried putting a backslash in front of the apostrophe, but it didn't 
work (syntax error, I think). Enclosing the string in double quotes 
worked, but I don't know where in the grub generation process that lines 
are generated...
I'm using grub 2.00-1 in arch linux.