I need one language to show up in Ajax Search box (WPML)

Hello,
I’ve opened a need ticket for WPML issue.

I have wpml compability switched on. I need to see reasults for a current language only but it finds results fot all 4 languages of website translation when I am for example on English version.

Example: I’m typing “pro” to the search box and it’s showing me “Post Production”, “Post Produktion”, “Post-Produzione” and I want to see only “Post Production” there.

Do you know what can cause this problem?

Thank you in advance.
Sylwia