Relational nouns are also widespread in South-East Asia (e.g. Vietnamese, Thai), East Asia (e.g. Mandarin Chinese, Japanese, Tibetan), the Munda languages of South Asia (e.g. Sora), Micronesian languages and in Turkish.
E.g., in Classical Nahuatl: .....................................
Similarly, in Japanese:
猫はむしろの上に寝ている。Neko wa mushiro no ue ni neteiru.
Cat [topic] mat 's top/above [case marker] sleeps/lies."The cat is sleeping on top of the mat."
この「上」が特別な、特殊な Relational nouns or relator nouns だと言いたいのか?