@rafalwlo, since the statements on the talk page are not valid according to your own argument, we can probably dispense with the opinions and statements there. The entire paragraph in the wiki is based on the Talk statements, so the entire paragraph is useless.

The abbreviation "St." for "Sankt" is the only internationally recognized usable abbreviation in the wiki. See also https://wiki.openstreetmap.org/wiki/Invalid_Abbreviation_Expansion

The city's name, which is used across all borders and is "St. Gallen" in all communications, should also be taken into consideration. This is not a short form or abbreviation but the only official name of the city.
