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.

point de solstice d'été ‘summer solstice’

French

References: PH Morelon: I.3:6, 18:23
Translation of:
Arabic: نقطة الانقلاب/المنقلب الصيفي [PH Morelon: I.3:6, 19:17; I.3:7, 19:19]