Description: It's not much but you can may fix it fast.
Translation problem in all XLPageTemplate files
in the line
'ULtoobigext' => 'file is larger than allowed maximum of $upextmax bytes for \'$upext\' files',
the variable isn't in qouts and should be replaced by
$UploadMaxSize. At least in German language it function.
New Line should be like ->
'ULtoobigext' => 'file is larger than allowed maximum of \'
$UploadMaxSize\' bytes for \'$upext\' files',
$UploadMaxSize would be wrong here, because
$UploadMaxSize is the default maximum for all uploads, whereas $upextmax is the maximum size for files of a given extension. The existing default is correct. (And the quotes are not needed.)