Most of the world uses Arabic numerals (0–9) but Arabic itself uses different symbols... That's quite confusing, do you know of other languages that use different symbols to refer to numbers? Or languages that use 2 types of numbers?
Thai. (taken from https://www.into-asia.com/thai_language/reference/numbers.php)
Chinese numbers (from https://blogs.transparent.com/chinese/chinese-numbers-1-100/):
Vietnamese actually has two sets of numbers, although one set is not commonly used. Vietnamese is an Austroasiatic language, but heavily influenced by Chinese, so several terms have an Austroasiatic version, and a Chinese version. In numbers, the Austroasiatic version is more prevalent, whereas the Chinese version is hardly ever used. E.g. 1 = một in Austroasiatic version, but nhất in the Sino-Vietnamese version.