How to set language for cck select field

My site is a multi-lingual site, the translations are working fine. All my cck field show a language either 'en' or 'ru', not 'und'
I have set up a new cck field, a select list. I can't figure out how to set the language for this field.
The node can be saved 'en' but the field always remains 'und' when I check the database table for that field.
Where can I change these settings?