This study investigates the role of orthography in German vowel production by Polish L1 speakers with German as an L2. Eighteen intermediate to advanced Polish L2 German learners and 20 German native speakers were recorded during a picture-naming task in which half of the experimental items were explicitly marked in their orthographic representation for their vowel length (short or long). Duration measurements revealed that explicit orthographic marking helped the Polish L2 German learners produce the short-long contrast more nativelike. The analysis of vowel quality further showed that (in)congruencies between L1 and L2 grapheme-to-phoneme correspondences may influence L2 vowel production as well. These findings have important implications for models of L2 speech learning and pronunciation training. 1997; Moyer, 1999). One of the greatest challenges for Polish L1 speakers with German as an L2 is the German vowel system (Hentschel, 1986; Hirschfeld, 1998; Morciniec, 1990). In contrast to Polish, which has six vowels and no phonological vowel length contrast, German exhibits a relatively high number of 15 vowel phonemes and makes use of a phonological distinction between long/tense and short/lax vowels (Pompino-Marschall, 2009). This leads to a number of minimal pairs that could potentially cause communication problems for L2 learners of German (e.g., Höhle /høːlə/ "cave" versus Hölle /hoelə/ "hell" or fühlen /fyːlən/ "to feel" versus füllen /fʏlən/ "to fill"). From an orthographic point of view, the long vowels in Höhle and fühlen are explicitly marked for their length by so called Dehnungs-h ("lengthening h"), which is a silent letter and a reliable marker for a preceding vowel to be ON THE ROLE OF ORTHOGRAPHY IN L2 VOWEL PRODUCTION long (Eisenberg, 2013). At the same time, the short vowels in Hölle and füllen are also explicitly marked for their length in that all German vowels which are followed by double consonant letters are short (Ramers, 1999). Since not all short and long vowels are explicitly marked for their length (e.g., Boden /boːdən/ "floor" or Wolke /vɔlkə/ "cloud") 1 , German is an ideal testing ground for the investigation of the effects of orthographic markings on L2 vowel productions.
ON THE ROLE OF ORTHOGRAPHY IN L2 VOWEL PRODUCTIONL2 pronunciation researchers and teachers assume that orthographic cues such as lengthening h can help German L2 learners establish different phonetic categories for short and long vowels and hence produce them more native-like (e.g., Dieling, 1983; Dieling & Hirschfeld, 2007). However, experimental evidence to test this assumption is still missing.Furthermore, German and Polish use the same graphemes to represent similar vowel phonemes. Escudero et al. (2014) have shown that the "congruency" between L1 and L2 grapheme-to-phoneme (G-P) correspondences plays an important role in L2 sound perception and can both help and hinder L2 word learning. The influence of (in)congruencies between L1 and L2 G-P mappings might also be relevant for L2 vowel production. Polish L2...