Why does phonetic adaptation by L1 speakers degrade intelligibility in L2 writing systems with shallow orthography?

💡 Explanation

Pronunciation drift alters the established grapheme-phoneme correspondence in the L2 system because the initial phonetic mapping becomes inconsistent with the written form, which impairs comprehension for native speakers of that L2. Therefore, intelligibility decreases, rather than increases, since the phonological forms deviate from the orthographic representations.

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