  In one of the papers, El-Maaref et al. [J. Elect. Spectrosc. Related Phen.
215 (2017) 22] have reported results for energy levels, oscillator strengths
(f-values), radiative rates (A-values), collision strengths ($\Omega$), and
excitation rates for transitions in S-like Mn~X. However, except for energy
levels their results are restricted to only a few transitions and hence have
limited application. Furthermore, most of their results have scope for
improvement, but for $\Omega$ are not correct as these have been found to be
overestimated by an order of magnitude. In this comment we discuss the
discrepancies and deficiencies of their results and recommend that a fresh
calculation should be performed for this ion.
