Hi Vincent
As Trevor mentioned we won’t be able to do the customisation as its too specific.
However, it shouldn’t be too hard to achieve with a little coding knowledge.
The logic I would use to achieve what you’ve described is as follows:
1) Using Javascript, set a cookie for the value of the region, whenever the search form is submitted (jqueries .on("submit")
.
2) Using PHP, check if you are on the homepage (WP has a few functions for this), and if cookie is set, then change the default in the field, we have a filter for modifying a field – https://searchandfilter.com/documentation/action-filter-reference/#filter-input-object – you’ll want to set: $input_object['defaults'] = array("your_cookie_value");
I hope that helps.
Thanks