Few Requests: HTML/Text Area, Duplicating Forms, Editing Address Area

Nic,

The hook you would use to change the address labels is a filter. Here it is:

add_filter("gform_address_street", "set_gravityform_street_address");
function set_gravityform_street_address($label){
    return "New Label";
}

The filter names are:

gform_name_prefix
gform_name_first
gform_name_last
gform_name_suffix
gform_address_street
gform_address_street2
gform_address_city
gform_address_state
gform_address_zip
gform_address_country

In the functions.php file for your theme you could use the filter above and depending on the language that is selected in qTranslate adjust the field labels accordingly.

Erwin,
The problem is that the is_page() function only works after a certain point in the WordPress life-cycle. Calling it directly from your functions.php will not work.
Try the following:

add_action("loop_start", "register_filters");
function register_filters(){
    if(is_page('41')){
        add_filter("gform_name_prefix", "set_gravityform_name_prefix");
        add_filter("gform_name_first", "set_gravityform_name_first");
        add_filter("gform_name_last", "set_gravityform_name_last");
        add_filter("gform_name_suffix", "set_gravityform_name_suffix");
        add_filter("gform_address_street", "set_gravityform_address_street");
        add_filter("gform_address_street2", "set_gravityform_address_street2");
        add_filter("gform_address_city", "set_gravityform_address_city");
        add_filter("gform_address_state", "set_gravityform_address_state");
        add_filter("gform_address_zip", "set_gravityform_address_zip");
        add_filter("gform_address_country", "set_gravityform_address_country");
    }
}

function set_gravityform_name_prefix($label){
    return "Voorvoegsel";
}

function set_gravityform_name_first($label){
    return "Voornaam";
}

function set_gravityform_name_last($label){
    return "Achternaam";
}

function set_gravityform_name_suffix($label){
    return "Achtervoegsel";
}

function set_gravityform_street_address($label){
    return "Adres";
}

function set_gravityform_address_street2($label){
    return "Adres (2e regel)";
}

function set_gravityform_address_city($label){
    return "Plaats";
}
function set_gravityform_address_state($label){
    return "Provincie/Staat";
}

function set_gravityform_address_zip($label){
    return "Postcode";
}
function set_gravityform_address_country($label){
    return "Land";
}