For your map, Irish license plates.
Installation Guidelines:
1) Extract the license plate zip files and your map.
2) In your maps zip file, copy the "licensePlates" folder.
The filename paths in the "licensePlates.xml" file may need to be changed to fit your folder layout, depending on your maps folder arrangement.
As of right now, the paths are set up such that the 'licensePlates' folder is located within the'maps' folder inside the maps zip file.
3) In your “map.xml” file, change the licensePlates filename path to refer to the “licensePlates.xml” file from the “licensePlates” folder.
As previously said, the file path to insert here is “maps/licensePlates/licensePlates.xml; however, this may vary based on your maps folder layout.
4 – OPTIONAL) To install the AI plates, change the licensePlates filename path in your 'trafficSystem.xml' file to refer to the 'aiLicensePlatesIE.i3d' file from the 'licensePlates' folder.
Note: You will need to transfer the trafficSystem.xml file from the basegame files your map is presently using and change the file paths in the “map.i3d” file if your map does not have its own.
5) Rezip your map.
An explanation of the many kinds of plates:
(2013 –> Present Day): yy#-cc-xxxxxx, where y = year of registration, for example, 21 = 2021, 13 = 2013, etc. # = 1 or 2. Vehicles registered in the first half of the year (January to June) are denoted by 1 and those registered in the second half (July to December) by 2.
C stands for county code. Depending on the county, this might be one letter or two. For instance, T stands for a vehicle registered in County Tipperary, and LM for a vehicle registered in County Leitrim.
x is the vehicle registration number; for example, 1 indicates that this is the first car registered in that county for that year, and 213 indicates that this is the 213th car entered in that county for that year.
Type 2/Type 4: (1987 –> 2012): yy-cc-xxxxxx, where y represents the year of registration (e.g., 09 = 2009, 93 = 1993, etc.).
C stands for county code. Depending on the county, this might be one letter or two. For instance, T stands for a vehicle registered in County Tipperary, and LM for a vehicle registered in County Leitrim.
x is the vehicle registration number; for example, 1 indicates that this is the first car registered in that county for that year, and 213 indicates that this is the 213th car entered in that county for that year.
Types five through nine: (Prior to 1987): Antique plates with various hues for the backdrop
The format may be either #### xxxx or xxxx ####, where x is a letter and #038 is a number.
One letter to three letters and one number to four numbers are examples of different formats.
The many county forms throughout time may be seen on the following Wikipedia page.
Types ten through thirteen: An imaginative license plate. Since this plate choice is not a real-life format, you may use your imagination. Only for the gamers that want a personalized license plate.
(*) This person isn't a mod. You may use this item to create Farming Simulator maps.

Credits: GlengarBoy, Dylan.C, and Eire Agri Modding