Filter the field's "placeholder" property.

Changing this value will alter the placeholder text that is displayed and will most commonly be used by WPML users.


(string) (required) The field placeholder
Default: The field placeholder

(int) (optional) The field ID
Default: the field ID

(int) (optional) The form ID
Default: the form ID


Change the placeholder of a field based on the language if the  WPML plugin is installed:

add_filter( 'vfbp_field_placeholder', 'filter_vfbp_field_placeholder', 10, 3 );

function filter_vfbp_field_placeholder( $placeholder, $field_id, $form_id ){    
    // if the WPML plugin is not installed, return the default field name
    if ( !defined( 'ICL_LANGUAGE_CODE' ) )
        return $placeholder;

    // the ICL_LANGUAGE_CODE constant is part of the WPML plugin (wpml.org)
    if ( ICL_LANGUAGE_CODE == 'en' )
        $placeholder = 'Enter text here';
    elseif ( ICL_LANGUAGE_CODE == 'fr' )
        $placeholder = 'Entrez le texte ici';

    return $placeholder;