Language name and location: Yangum Mon, Papua New Guinea [Refer to Ethnologue]
语言名称和分布地区: 扬古姆-蒙语 (埃库语Aiku), 巴布亚新几内亚桑道恩省努库镇

1. ipaka

2. tɨpiak

3. wanuk

4. piakpiak (2+2)

5. pam waᵐbu (lit: ''hand half'')

6. pam waᵐbu ipaka (5+1)

7. pam waᵐbu tɨpiak (5+2)

8. pam waᵐbu wanuk (5+3)

9. pam waᵐbu piakpiak (5+2+2)

10. pam waᵐbu pam waᵐbu (5+5) (lit: ''hand hand'') 

11. pam waᵐbu pam waᵐbu ipaka

12. pam waᵐbu pam waᵐbu tɨpiak

13. pam waᵐbu pam waᵐbu wanuk

14. pam waᵐbu pam waᵐbu piakpiak

15. pam waᵐbu pam waᵐbu rak waᵐbu

16. pam waᵐbu pam waᵐbu rak waᵐbu ipaka

17. pam waᵐbu pam waᵐbu rak waᵐbu tɨpiak

18. pam waᵐbu pam waᵐbu rak waᵐbu wanuk

19. pam waᵐbu pam waᵐbu rak waᵐbu piakpiak

20. pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu

Linguist providing data and dateː Dr. Kyosuke Yamamoto, Department of Linguistics, World Language and Society Education Centre, Kyoto University, Kyoto, Japan. October 11, 2021.
提供资料的语言学家: 山本恭裕博士, 日本京都大学, 2021 年 10 月 11 日

Other comments: Aiku, Yanguo Muan or Yangum Mon is spoken by approximately 700 speakers in Monandin village, north-west of Nuku town, Sandaun province, Papua New Guinea. The Aiku counting system is a finger-and-toe tally system with four numerals, ipaka, tɨpiak, wanuk, and piakpiak. piakpiak is clearly related to tɨpiak and it seems to involve a ‘2+2’ construction. However, there is no putative root such as piak, and thus piakpiak itself can be considered as an independent numeral. rak means ‘foot’ and pam- means ‘hand’. The Aiku people can count up to 90 asː pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu.

Other higher numerals areː

21. pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu ipaka

25. pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu

30. pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu

40. pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu

50. pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu

60. pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu

70. pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu

80. pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu pam waᵐbu pam waᵐbu rak waᵐbu rak waᵐbu

Aiku Consonant Chart

Aiku Vowel Chart

* ɨ is not phonemic but is an allophone derived by vowel reduction.

Language name and location: Yangum Mon, Papua New Guinea [Refer to Ethnologue]
语言名称和分布地区: 扬古姆-蒙语 (埃库语Aiku), 巴布亚新几内亚桑道恩省努库镇

1. yipeaka

2. piyak

3. wanuk

4. piyak piyak (2+2)

5. pam wambu (lit: 'hand half'')

6. pam wambu kia (5+1)

7. pam wambu piyak (5+2)

8. pam wambu wanuk (5+3)

9. pam wambu piyak piyak (5+2+2)

10. pampap pampap (5+5) (lit: ''hand hand'') 

15. pampap pampap rak wambu

20. pampap pampap wulap wulap 

Linguist providing data and dateː Dr. Glen A. Lean, Department of Communications, Papua New Guinea University of Technology, Lae, Papua New Guinea, 1991.
Sourceː Glendon A. Lean. Counting systems of Papua New Guinea, volume 13, West Sepik (Sandaun) Province. Department of Mathematics and Statistics, Papua New Guinea University of Technology, Lae, Papua New Guinea, 1991.
提供资料的语言学家: Dr. Glen A. Lean, 1991 年.

Other comments: Aiku or Yangum Mon is a member of the Palei Family, Wapei-Palei Stock, is spoken in the villages (Laycock, 1973, p.11) which lie in the West and East Palei Census Division. At the 1980 National Census, the villages list by Laycock has a total resident population of 866.

   One CSQ was received from an informant from Monandin village. The informant indicates that the Aiku system is a digit-tally one which utilizes both fingers and toes. There appear to be three numeralsː 1,'yipeaka', 2,'piyak', and 3,'wanuk', The cardinal

4,'piyak piyak', however, has a '2+2' construction and thus the system has a modified 2-cycle. The number word for 5, 'pam wambu', may be translators as 'hand half' and 10, 'pampap pampay', as 'hand hand'. The cardinal 15 contains, in attrition, a 'foot' or 'leg' morpheme, 'rak', and may be translated as 'hand hand foot half'. Tallying on the digit of one man is complete at 20 which is 'pampap pampan wulap' (no translation of 'wulap' is provided. The system thus possesses a (2, 5, 10) pattern. New data needed to compare with the old one.