A mixed language may mark the appearance of a new ethnic or cultural group, such as the Métis.

Usually this is from visual observation (eyewitness), but some languages also mark information directly heard with information directly seen.

Some languages mark visual evidence differently from nonvisual evidence that is heard, smelled, or felt.

Other (non-European) languages clearly mark these differently.

To him, simple language did not mark a simple mind, but a strong, fearless one.

These languages generally mark a number of types of inter-casual relationships and have distinct construction involving verbal auxiliaries.

Different languages mark topics in different ways.

But the new language marked a change in relations, which the administration has until now handled with painstaking delicacy.

Some languages also mark interrogatives morphologically, i.e. by inflection of the verb.

Many Ryukyuan languages mark both nominatives and genitives with the same marker.