New Post: SPCascade on other language

Hi all,
please, can you help me ? I tried to use cascade feature, I prepare me own web part.
used parameters:
-GUID current list
-GUID relationshiplist

• parent column static name
  -child column static name
• parent display field name
• child display field name
  No other params in my script. In default language (UK) everything works fine, but when I switch to other language (Slovak) it doesn't work. What I did:
• replace parent display name
• replace child display name
• turn on debug mode.
  

but no errors, and no filtering related items :( Where I have to find an error ? What else I must change ?
Thank you very much.