How do I use Hebrew letter to alight fields from right to left in the form ?

Yes, it is possible to use the RTL direction using custom CSS.

Here's the CSS code:

.form-sub-label {
direction:rtl;
}

.form-all {
direction:rtl;
}

.form-line-column,.form-label-right,.form-radio-item {
float:right;
}

.form-label.form-label-auto {
text-align: right;
direction:rtl;
}

Here's a guide on How-to-Inject-Custom-CSS-Codes.

Here's the result:

Hope this helps!

Thanks.