What does approb mean?

Saw a manga that used “approb” as translation of SFX. Translator I believe is non-native.

Source: Maou-sama ni Shoukan sareta kedo Kotoba ga Tsuujinai - Vol. 3, Ch. 19

approb is likely short for approbante, which is a scholarly borrowed Latin term meaning “with approval of”. So the translator likely intended to convey a sense of scholarly approval or backing for her performance.

I can’t find a source justifying this translation.