Free custom dictionary for SCAYT

Hello,

we are using CKEditor 3.5.3 (revision 6655) with an unlicensed SCAYT in my company. We would like to change from default SCYAT-Server to a dictionary on our own server. Is there any free dictionary for SCAYT-plugin? Or can it be done by myself (for example using an empty dictionary, where everyone adds the words)?

Thanks in advance,
Franz