A Question of Attestation

Does anyone know of a language that is

• written with an alphabet that normally uses the arabic numerals and
• has a non-decimal base and
• and permits writing numbers using that non-decimal base using arabic numerals?

The other base might be marked by some symbol (or might be implicit from context). Maybe something like

yada yada yada (1234) yada yada yada => yada yada yada 668 yada yada yada

In this case, octal is marked by parentheses. This might be a bit curios, but parentheses are used as punctuation in ways that differs significantly from their English use in some languages. However, I admit they might be even more confusing due to their use in maths, so maybe something like

yada yada yada  ₈1234 yada yada yada.

If this isn't attested, I claim it for Tatediem (but with Bryatesle numbers instead).