Low Common is a language used by many races, although the use of Low Common suggests only a looser or simpler understanding of Common rather than the user necessarily being of low intellect.
Low Common is not to be confused with "broken Common" which is apparently different. Some of the most famous phrases which may be examples of Low Common, include the battle cries of kobolds, "You no take candle!", and ogres, "Me smash! You die!" It is also used by many of the troll tribes of the world that descended so far into barbarism that they had forgotten the Zandali language.
Separate dialects of Low Common may exist based on a race's culture; Nerglish is said to be a low aquatic tongue akin to Low Common.
"Low Common" has an apparent connection to DnD derived generic languages, which apparently can be found in DnD rule books. It may be a crude and simple version of the Common language, similar to broken Common.
Tharil'zun speaks a language named broken common which may be another name.