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In page Quechuan languages:

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The different orthographies are still highly controversial in Peru. Advocates of the traditional system believe that the new orthographies look too foreign and believe that it makes Quechua harder to learn for people who have first been exposed to written Spanish. Those who prefer the new system maintain that it better matches the phonology of Quechua, and they point to studies showing that teaching the five-vowel system to children later causes reading difficulties in Spanish.[citation needed]