klingon

As a proper noun blue

is an anglicization of (etyl) blau.

As a noun klingon is

(eo-form of).

As nouns the difference between klingon and borg

is that klingon is (eo-form of) while borg is (slang) one who proselytises or assimilates.

As a verb borg is

(slang) to assimilate rivals, via corporate acquisition or religious proselytisation.

As nouns the difference between klingon and klingonist

is that klingon is (eo-form of) while klingonist is one who studies the klingon language.