In order to send client welcome emails in Spanish, you must include their language preferences in bulk upload. 

Note: Client language preferences for welcome emails cannot be retroactively changed. 

In the Buyers Bulk Import Template - Column G

In the Loan Officer's Bulk Import Template - Column V

Did you already bulk import your clients? It may not be too late! Reach out to the support team by using the pink message icon in the bottom right hand corner of your screen.