PAL

Ptolemaeus Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.
%% (two percent signs) is the placeholder for no, one or more than one character, but not for blank space (so that a search ends at word boundaries).

At the beginning and at the end, these placeholders are superfluous.

representing ‘in place of’

English

References: Plan. Sidoli+Berggren: ?
Translation of:
Arabic: مكان [Plan. Sidoli+Berggren: 9, 14, 48, 56, 73, 81, 501, 514]