multi-byte character
Technical term in computing for a character encoded using two or more bytes, as opposed to single-byte characters.
Japanese characters are often represented as multi-byte characters.
This system cannot handle multi-byte characters correctly.
Refers to single-byte characters, typically ASCII, in contrast to multi-byte characters.
Synonymous loanword form; 複数バイト文字 is the more Japanese-native phrasing.
Compound of 複数 (multiple) + バイト (byte) + 文字 (character), a straightforward technical term.