en_tn/gal/05/14.md

the whole law is fulfilled in one command

Possible meanings are 1) "you can state the whole law in just one commandment, which is this" or 2) "by obeying one commandment, you obey all the commandments, and that one commandment is this."

You must love your neighbor as yourself

The words "you," "your," and "yourself" are all singular. (See: rc://en/ta/man/translate/figs-you)