>>I know it's nearly impossible to explain left vs right to an E.T., but... if you don't pronounce the "doo" same as "dew", then there's the "y" sound in "dew" which makes them different - and that's what's spelt as "j" in my Serbian references. So... what's that sound doing in a French "du-"?
>
>I thought I'd explained in my phonetics, you form the lips as if to say "o" but try to say "ee". So "du" and "tu" have no "y" consonent sound.

OK, then why did you put
>>Camus - Cammewss ("ew" being forming the lips to say "o" but trying to say "ee"). Normally a terminal "s" is silent but French has its exceptions like English does.
>>Debut - duh-bew ("uh" being the "nothing" vowel)
>>Design - Deh-zeenyuh ("eh" as in "heh!")
>>Dupree - Dew-prey

with -ew- (aka yoo) for -u- in Camus, debut, Dupree? Also, why the -ey in the end of the last?

>And BTW, the ETs I've met, back home, know full well the difference twixt left and right.

That's back home. Try to explain to some you don't see and don't know where they are nor what (*) they are, with text only.

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"what" in both meanings - which noun are they, i.e. their identity as persons, species etc, and which adjectives do apply to them.