Both Spanish personal identifiers in one pattern: the DNI, eight digits and a check letter, and the NIE, a leading X, Y or Z then seven digits and a check letter, with the hyphen often typed between number and letter left optional. The trailing class is exactly the twenty-three letter check alphabet, so I, O and U, which are never issued, are refused, and that removes about an eighth of the random false positives for free. An eight digit order number followed by a letter still matches. No collision: the existing us-passport is letter first and cannot overlap a letter last DNI.
Label: ES_DNI_NIE
\b(?:\d{8}|[XYZ]\d{7})-?[A-HJ-NP-TV-Z]\bDNI 12345678Z sur le contrat. → 12345678ZNIE : X1234567-L → X1234567-L1234567Z12345678ITags: es, government-id, identity