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.

lucide stelle in primo Cane ‘α CMi’

Latin

References: TB Latin ?: ?
Translation of:
Arabic: الكوكب النيّر الذي في الكلب المتقدّم [TB Ar. Yamamoto: 1:9, 48:22]