After make a backup of my previous server.

I make again the 5 languages.
But when i wanted replace the new files by the old ones via FTP
I don't see language files in /mysite/languages/

Whare are the new made files?

Thank you to help.

SH*T i did compile languages...
Now i think i did someting wrong...
All the keys are gone :( 

Are you sure about this?

You can't add languages by editing and uploading files like that. If these are system language files, you need to import them from Administration => Settings => Languages Settings. If you bought them from the market, check for the installation instructions included with the download. To add keys or custom translations, edit from the Administration Panel.