to influence from indigenous languages, such as Nahuatl, Mexican Spanish has incorporated many words containing the sequences and , corresponding to the voiceless alveolar affricate and the voiceless alveolar lateral affricate , present in many indigenous languages of Mexico, as in the words ('hardware store') and ('from [the city of] Coatzacoalcos'). Mexican Spanish always pronounces the and in such a sequence in the same syllable, a trait shared with the Spanish of the rest of Latin America, that of the Canary Islands, and the northwest of the Iberian Peninsula, including Bilbao and Galicia. This includes words of Greek and Latin origin with such as and . In contrast, in most of Spain, the would form part of the previous syllable's coda, and be subject to weakening, as in , . Some claim that in Mexican Spanish, the sequence is really a single phoneme, the same as the lateral affricate of Nahuatl. On the other hand, José Ignacio Hualde and Patricio Carrasco argue that is best analyzed as an onset cluster on the basis that Mexicans take the same amount of time to pronounce as they do to pronounce and . They predicted that if were a single segment, it would have been pronounced quicker than the other clusters. Fricatives In addition to the usual voiceless fricatives of other American Spanish dialects (, , ), Mexican Spanish also has the palatal sibilant , mostly in words from indigenous languages—especially place names. The , represented orthographically as , is commonly found in words of Nahuatl or Mayan origin, such as (a station in the Mexico City Metro). The spelling can additionally represent the phoneme (also mostly in place names), as in itself (); or , as in the place name Xochimilco—as well as the sequence (in words of Greco-Latin origin, such as ), which is common to all varieties of Spanish. In many Nahuatl words in which originally represented , the pronunciation has changed to (or )—e.g. . Regarding the pronunciation of the phoneme , the articulation in most of Mexico is velar , as in ('box'). However, in some (but not all) dialects of southern Mexico, the normal articulation is glottal (as it is in most dialects of the Caribbean, the Pacific Coast, the Canary Islands, and most of Andalusia and Extremadura in Spain). Thus, in these dialects, , and are respectively pronounced , , and . In northwestern Mexico and