We should update to ISO 14651 6th Edition released in 2020: https://standards.iso.org/iso-iec/14651/ed-6/en/ISO14651_2020_TABLE1_en.txt Such an update requires: - Harmonizing the existing language collation tailorings (see commit 159738548130d5ac4fe6178977e940ed5f8cfdc4). - Updating the data to meet the regular expression rational range expectations for English language speakers (see commit 7cd7d36f1feb3ccacf476e909b115b45cdd46e77 "Keep expected behaviour for [a-z] and [A-z] (Bug 23393)."