2.1.1031 Part 1 Section 18.17.7.275, RIGHT

a.   The standard specifies that RIGHT is intended for use with languages that use the single-byte character set (SBCS), whereas RIGHTB is intended for use with languages that use the double-byte character set (DBCS).

In Office, RIGHT is intended for use with any language, whereas RIGHTB is intended for use with languages that use the double-byte character set (DBCS).