Release note for -- AKARI/IRC MIR-S slit-less spectroscopic catalogue -- Please read the reference paper (Yamagishi et al. 2019) carefully prior to playing with the data. [FAQs for the spectroscopic catalogue] Q. I find objects with curious spectral features. Are these features real? A. Please check following points to convince the spectral feature. 1. Toolkit-output images. Sky/target level may be affected by detector anomaly; e.g, a cluster of bad pixels and large-scale scattered light due to nearby bright objects. 2. Other slit-less spectra if the source is detected more than once. Q. There is a gap around 8 micron in S-graded spectra. A. Scaling of toolkit-output SG1 and SG2 spectra may be wrong depending on the noise level at 7.85-8.2 micron. We recommend you to combine the toolkit-output SG1 and SG2 spectra by yourself using the spectra and 9 micron flux in the point source catalogue. Q. Do nearby diffuse emission affect spectra? A. If your target is not so bright and in bright diffuse structures, nearby diffuse emission may contaminate to the target spectrum. Q. What is the black square area seen in the bottom right of some reference images? A. "Soramame" structure was unstable in observations performed during 22-29 Apr 2006 (Egusa et al. 2016). We masked out the region around "Soramame" for such data. [FAQ for the point source catalogue] Q. I find an object not recorded in any other catalogues. Is this a new discovery? A. Check the number of detections in the point source catalogue. If the object is detected only once and faint (<10mJy), the detection is doubtful. We recommend you to download reference images taken at different observations, and check whether the source is seen at the expected position in other reference images. [Release info] version 1.0 09-Nov-2018 Please send your comments and suggestions to iris_help@ir.isas.jaxa.jp (EOF)