Category:Word Order
Feature:Order of Adposition and Noun Phrase WALS
Name:No dominant order
Languages (42):
Conlangs (41):
Sa'nakkan
Kazujisha
Ngengenoef
Velyan
Sakalian
Tinzirean
Classical Rossan
Surang Jumbar 
There are far more prepositions than postpositions in Surang Jumbar. But the postpositions are much more frequently used, so no order can be considered dominant.
Saimiar
Na'vi
Baranxe'i
Zorillo
Dhannuá
Redspeech
Anikele
Celinese

Celinese has both prepositions and postpositions.
Applelang

some adpositions are obliged to be postpositions, but other adpositions can be either prepositions or postpositions.
Doayâu
Raxic
Ilaini
Femmish
Meino
FeNeKeRe
Old Sumrë
Faikari
Choton
Napasei
Centaurian
Sylvan
Cylvian
Syt
Szezk
Ithkuil III
Akxera
Agalatian
Standard Knrawi
New Ithkuil
Jokelang 2
Frangian Sign
Asso-Thrystian
Arusian

Natlangs (1):
Koromfe