How to read Japanese numbers

"0" can be pronounced as れぃ or ぜろ in Japanese.

ぜろ can be written directly in hiragana or katakana.

"70" is usually pronounced as ななじゅぅ in Japanese. As a number, 90 is usually pronounced きゅぅじゅぅ. But some words can be pronounced くじゅぅ.

In the usual writing of the first person "わたし", Chinese characters can be written as "I" or "private". However, we should understand that "private" can also be pronounced as "わたくし", and "private" is a self-mockery of "me".