Setting Users' Portal Language automatically

Hello,

We have recently migrated from EP7.0 to CE7.3 EHP1 SP9 Portal.

During this, we have lost user's Portal Personalization setting. Now, on new CE73 Portal, Personalization language for ALL users is BLANK.

Is there any way to set Portal Language to something, say EN, for a group of users through some setting/import/export?

Please help.

Thanks & Regards,

Amey Mogare