Planning and customization of introductory L2 phonetic courses on the basis of a numeric scale for assessing non-native speaker mistakes

Based on an empirical verification of L1–L2 contrastive analysis results, the author designed a methodology and a numeric scale for assessing consonant errors typical of Russian native speakers speaking German. The paper describes how the scale can be used for detecting and ranging main discrepancies between Russian and German consonant systems resulting from different phonological status of phonetic palatalization, aspiration and semi-voicedness.