I've developed a number system based on words from Tok Pisin that describes the basic digits:

Tok Pisin's number system:

0 - siro

1 - wan

2 - tu

3 - tri

4 - foa

5 - faiv

6 - sikis

7 - seven

8 - et

9 - nain

10 - ten

1000 - tausen

toki pona transliteration of Tok Pisin's system:

0 - ala/sike*

1 - wan

2 - tu

3 - si (or tuli)

4 - po

5 - pa

6 - se

7 - sen

8 - ete

9 - nan

000 - tosen**

*sike is used as a placeholder and ala represents the concept of zero

**tosen is used to replace three zeros when writing larger numbers. It is similar to multiplying the preceding number by a thousand

Numbers can be translated by listing the digits, using sike as a placeholder and tosen instead of 000

Examples:

0 - ala

10 - wan sike

16 - wan se

50 - pa sike

1,000 - (wan) tosen*

2,017 - tu sike wan sen

5,000 - pa tosen

88,000 - ete ete tosen

90,000 - nan sike tosen

1,000,000 - (wan) tosen tosen

1,234,567 - wan(tosen), tu si po(tosen), pa se sen**

9,999,999 - nan (tosen), nan nan nan(tosen), nan nan nan**

*wan is optional before tosen, because tosen can be inferred to mean one thousand

**tosen can be added to add clarification if necessary

Alternatively, you can treat the numbers in the system as foreign words by adding nanpa in front:

7 = sen --> nanpa Sen

19 = wan nan --> nanpa Wan Nan

2,018 = tu sike wan ete --> nanpa Tu Sike Wan Ete

9000 = nan tosen --> nanpa Nan Tosen