[Fe/H] as function of the effective temperature (top row) and surface gravity (lower row) for 4 globular clusters. The parameters from the “original” GALAH data are shown by the orange points, while the value transformed on the APOGEE-2 base by the SPECTROTRANSLATOR are shown by the blue circles. The red points show the values for the stars present in the APOGEE-2 DR17 dataset. The filled circles highlight the stars observed by both APOGEE-2 and GALAH, while the open circles show the stars that have been observed either by APOGEE-2 or GALAH. The colourised triangles with the error bars indicate the average uncertainties on the individual [Fe/H] measurements in the corresponding catalogue. The horizontal red and blue lines indicates the mean metallicity of the cluster measured using the ‘original’ APOGEE-2 and transformed GALAH values, respectively.