Problems with other modules and languagepacks

I get these errors and don't understand what I should do to remove them.

Warning: payment(includes/languages/finnish/modules/payment/eustandardtransfer.php) [function.payment]: failed to open stream: No such file or directory in /home/finaje/public_html/shop/includes/classes/payment.php on line 62

Warning: payment() [function.include]: Failed opening 'includes/languages/finnish/modules/payment/eustandardtransfer.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/finaje/public_html/shop/includes/classes/payment.php on line 62

Warning: payment(includes/languages/finnish/modules/payment/invoice.php) [function.payment]: failed to open stream: No such file or directory in /home/finaje/public_html/shop/includes/classes/payment.php on line 62

Warning: payment() [function.include]: Failed opening 'includes/languages/finnish/modules/payment/invoice.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/finaje/public_html/shop/includes/classes/payment.php on line 62

Everything works perfectly when using english but other languages fail me. I cannot get other payment modules to work in other languages than the ones that are in the original pack of zencart.

Yep!
I'm having the same problem, except that the line number on error msg is different.
Warning: main(includes/languages/spanish/.php) [function.main]: failed to open stream: No such file or directory in /home/.kakoo/cloud4/cloudforestmexico.org/zen_test/includes/init_includes/init_templates.php on line 72

Warning: main() [function.include]: Failed opening 'includes/languages/spanish/.php' for inclusion (include_path='.:/usr/local/lib/php') in /home/.kakoo/cloud4/cloudforestmexico.org/zen_test/includes/init_includes/init_templates.php on line 72

The question is which php file in what directory am I supposed to edit?

Any suggestion be greatly appreciated.

S^2