This is the 4211th most frequent Spanish word.
mx
"MX" is not a standard Spanish word. It is often used as an abbreviation for "México" or a gender-neutral honorific.
Here 'MX' refers to Mexico as the country designation.
El código postal de la zona es 12345 MX.
The postal code for the area is 12345 MX.
In this case, 'MX' is a shorthand or abbreviation for Mexico, referring to the country.
MX es conocido por su riqueza cultural y natural.
MX is known for its cultural and natural wealth.
'MX' in this example is used on a license plate to denote Mexico as the location of registration.