Western Tlacolula Valley Zapotec  Tlacolula Valley Zapotec or Valley Zapotec, formerly known by the varietal name Guelavia Zapotec ("Zapoteco de San Juan Guelavía") is a Zapotec language of Oaxaca, Mexico. Tlacolula Valley Zapotec is a cluster of Zapotec languages spoken in the western Tlacolula Valley, which show varying degrees of mutual intelligibility. All varieties of Valley Zapotec are endangered. The languages in this group include:   Teotitlán del Valle dialect is divergent, 59% intelligible to San Juan Guelavía proper. Valley Zapotec is also spoken in the city of Oaxaca, capital of the state of Oaxaca. In April 2014, linguist Brook Danielle Lillehaugen, along with students from Haverford and Swarthmore Colleges, visited Tlacolula de Matamoros to present an online Tlacolula Valley Zapotec talking dictionary to local leaders. It was estimated that about 100 elderly speakers of this Zapotecan language remain. Tlacolula Valley Zapotec is a VSO language. Most stops occur to be realized as fricatives and may fluctuate as well; /p b d ɡ/ become /ɸ β ð ɣ~x/. Rhotic consonants are voiceless when preceding a voiceless consonant; /ɾ~r/ ~ /ɾ̥~r̥/. Most consonants may also be geminated (ex. /t/ ~ /tː/). Approximant consonants are phonetically realized as [j̟] and [w̟]. [source]  Voiceless stops generally have a slight aspiration. Some sounds are only found in loanwords (/f/ and /j/). The following is represented in the San Juan Guelavía dialect:  Tlacolula Valley Zapotec vowels are classified as modal, creaky (á), checked (a'), or breathy (ah). Vowels may also occur as pharyngealized /vˤ/ or glottalized /vˀ/. [source?] Vowels may be differentiated by phonation and tone. Tlacolula Valley Zapotec has four tones: level high, level low, rising, and falling.