These fields are the text in the parent portal that is to be translated, for example in the parent portal the word city has to be translated so you enter the word city in the field name and then click save.  For this to work, these fields have to be setup in the parent portal to accept the translation.  This is done in the PHP language and an example is shown below:


<label class="control-label"><?php if(!empty($reslang['City'])){ echo $reslang['City']; }else{ echo "City"; } ?> <span style="color: red">*</span></label>