Category:Phonology
Feature:Weight Factors in Weight-Sensitive Stress Systems WALS
Name:Long vowel
Languages (84):
Conlangs (71):
Cholnish
Alashian
Tauro-Piscean
Kisuna
Neo-Khitanese
Malabas
Avorenta
Kono Mai
Ukhshaya
Kēlen
Fae
Qucheanya
Kti
Nauspayr
Qorolese
Salhari
Kannow
Austrian Celtic
Yìrasì
Prsänëan
Popsiclian
ProConlang
Vrlungla
Ata
Hercsex
Sonorian
Gehui
Sathura
Xazik Gohuilim
Iaskyon
Haneko
Meletsian
Geulish
Laefevesi
Primitive Tule Defi
SLMN
Caryatic 
If a word contains any long vowels, the one nearest the beginning of the word is stressed, otherwise, the word is stressed on the first syllable.
Derovian
Tnaaq
Cyraceí
Ensurti
Draconic
Classical Airumali
Ilawokou
Nanawe
Kibaki
Dhrahhynian
Random
Zheymi
Ilcharotic
Chlouvanem
Varo
Cylvian
Muosan
funda
Sarikan
Senduri Diphthong in final syllable attracts stress though there are no long monophthongs.
Delang
Qaelian
Batean
Speech of the New West
Ngoosha
ABCL
Soc'ul'
Arusian
Nungonian
Nungonic
Asso-Thrystian
Clone of Arusian
Pateko
Tiilamee

Natlangs (13):
Hungarian
Apurina
Epena Pedee
Evenki
Fijian
Hunzib
Khalkha
Koasati
Maori
Martuthunira
Ngiyambaa
Karok
Irish