The Luxembourg Workplace Mobbing Scale (LWMS) is a very brief (five-item) unidimensional instrument to assess workplace mobbing exposure in the general working population. It was validated in three different language versions (German, French, Luxembourgish). Using data collected via computer-assisted telephone interviews in representative samples of Luxembourgish employees, two studies (Steffgen et al., 2019; Sischka et al., 2020) confirmed its reliability, factor structure, construct and criterion validity, as well as (partial) scalar invariance across language, age, gender, and occupational groups. Due to its briefness while at the same time being robust against language, age, gender, and occupational group factors and exhibiting meaningful criterion validity, the LWMS is particularly attractive for large-scale surveys.