J. 'Mach' Wust scripsit:

> We use ['?m=?m=] or ['?@?@] for negation and [?m='hm=] or [?@'h@] for
> affirmation even though our words can't have [m=], [?], or stressed [@].

These are also used in American English and in Scots and Scottish English.
AFAIK they are not common in the English of England, though not altogether
unknown there either.

However, I at least say the first affirmative form with a voiceless
nasal rather than ['h]; the lips remain closed throughout.

> Have people come up with special interjections for their conlangs?

Lojban has a whole array of emotional indicators, with optional intensity
indicators as well, expression about 80 significant emotions.
These can also be subdivided as physical, social, emotional, intellectual,
sexual, or spiritual varieties.  AFAIK, Lojban has the richest facility for
emotional expression of any known conlang, which is rather ironic for a
"logical language" (but moving the emotional expressiveness out of the
logic-based core makes sense in its own way).

John Cowan   [log in to unmask]
Most languages are dramatically underdescribed, and at least one is
dramatically overdescribed.  Still other languages are simultaneously
overdescribed and underdescribed.  Welsh pertains to the third category.
        --Alan King