Languages
GOCARS.online supports a method to pre-set the booking engine language in order to be called from multi-lingual websites directly to the native language of the visitor.
Supported parameters
| NAME | TYPE | RANGE / SET | REQUIRED | EXAMPLE |
| lang | string | de, de_DE
el, el_GR en, en_GB es, es_ES fr, fr_FR it, it_IT pl, pl_PL |
NO | lang=el |
Usage
If only the language code is provided, the first locale supported for that language will be utilized (e.g., en=en_GB).
The hotelier reserves the right not to support certain languages (English is the default and is consistently available). To determine the supported languages, please refer to the booking engine.
It is highly encouraged to utilize the GET method whenever feasible to display the appending of query keys to the booking engine URL. In cases where the property’s website supports multiple languages, links or forms directing to the booking engine should set the lang parameter to align with the website’s language.
The lang parameter can be combined with Availability parameters.
CAUTION
Do not forget to replace clientdemo.gocars.gr in the examples below with the real booking engine hostname.
If you don’t know the hostname yet, please contact GOCARS.online support.
Examples
GET request with HTML form
<form action="https://clientdemo.gocars.gr/select" method="get"> <label for="pickup_id">Pick-up Location</label> <select id="pickup_id" name="pickup_id"> <option value="1" selected>Corfu Airport</option> <option value="3">Corfu Town</option> <option value="13">Corfu Port</option> <option value="12">Dassia</option> </select> <label for="return_id">Drop-off Location</label> <select id="return_id" name="return_id"> <option value="1" selected>Corfu Airport</option> <option value="3">Corfu Town</option> <option value="13">Corfu Port</option> <option value="12">Dassia</option> </select> <label for="date_from">Pick-up Date/Time</label> <input id="date_from" name="date_from" placeholder="dd/mm/yyyy" value="15/05/2026"> <input id="time_from" name="time_from" placeholder="hh:mm" value="12:00"> <label for="date_to">Drop-off Date/Time</label> <input id="date_to" name="date_to" placeholder="dd/mm/yyyy" value="15/06/2026"> <input id="time_to" name="time_to" placeholder="hh:mm" value="12:00"> <label for="age_group_id">Age Group</label> <select id="age_group_id" name="age_group_id"> <option value="27">18-24</option> <option value="28" selected>25-75</option> <option value="29">76-85</option> </select> <button type="submit" class="search-button">Search Prices</button> </form>
GET request with Link
https://clientdemo.gocars.gr/search?lang=el
https://clientdemo.gocars.gr/select?pickup_id=27&return_id=27&date_from=23/02/2026&time_from=12:00&date_to=24/02/2026&time_to=12:00&age_group_id=29&vehicle_type=car&lang=el
