PDF Fillable forms. Text field $ amount.

Fillable text field. I need a script for for 5,000 increments. Here is the line of text for the field.

Face Amount $ _________ minimum $ 5,000 to a maximum of $ 30,000 (must be in units of $ 5,000)

User must only be able to enter.... 5,000 or 10,000 or 15,000 or 20,000 etc to 30,000.

I would also need this to work for French, commas to space.

Thank you in advance.