Base 8 counting in Gevey

Gevey, like most other Vreski family languages, uses a base 10 number
system. However, all other languages on the continent use a base 8
system. Now as Gevey is a widespread trading language, it needs to be
able to count in base 8 as well as base 10.

To get round the problem, Gevey speaking traders imported a base 8
counting system from Ylstra-Bedin (a completely unrelated, but
geographically close, language from the Istran family). Details of the
counting system follow:

Numerical units

  0 - zo
  1 - bo
  2 - to
  3 - vo
  4 - sho
  5 - go
  6 - lo
  7 - mo

A number is made by combining the numerical unit with the particle ji.
For numbers greater than 7, numerical units are combined with the
unit's vowel changing according to the power of the number it
represents:

  0 -o
  00 -ae
  000 -aa
  0000 -ou

So, we get:

  Decimal   Gevey no   Octal     Istral no
  1         onu       1         boji
  2         drasu     2         toji
  3         besu      3         voji
  4         vilu      4         shoji
  5         finu      5         goji
  6         dizu      6         loji
  7         aderhu    7         moji
  8         espenu    10        baeji
  9         nuunu     11        baeboji
  10        oki       12        baetoji
  11        okionu    13        baevoji
  12        okidrasu  14        baeshoji
  13        okibesu   15        baegoji
  14        okivilu   16        baeloji
  15        okifinu   17        baemoji
  16        okidizu   20        taeji
  17        okiderhu  21        taeboji
  18        okispenu  22        taetoji
  19        okinuunu  23        taevoji
  20        draki     24        taeshoji

  44        vilhkivilu 54       gaeshoji
  100       oci       144       baashaeshoji
  1000      okici     1750      boumaagaeji
  1964      okinuunci dizkivilu  3654     voulaagaeshoji
  2001      drakici onu   3721      voumaataeboji

This system works fine until we reach 1 0000 (base 8) [4,096 base 10].
After this point, numbers are clustered into groups of four, with jaji
replacing ji for the numbers between 1 0000 [4,096] and 7777 7777
[16,777,215] and heji replacing ji for numbers equal and above
1 0000 0000 [16,777,216].

  40,000    vilu milhu  11 6100  baebojaji loushaaji

etc.

One consequence of this is that many people - even people who have
difficulty doing moderately simple multiplication/division sums - are
able to convert between base 10 gevey numbers and base 8 istran
numbers almost subconsciously, and always accurately.

Thoughts and comments welcome

Rik

--
   The Gevey language reference
   http://www.kalieda.org/gevey/index.html