| From a linguistic perspective, any protolanguage would be merely embryonic. |
| Czech, Slovak, and Serbian and Croatian, which have the usual three sets of labial, dental, and velar consonants inherited from the protolanguage, have developed a special additional series of palatal stops. |
| It is likely that at some point in time humans spoke a protolanguage in which most words had neither holophrastic nor atomic meanings. |
| This claim would be supported by a demonstration that linguistic behavior during sleep is restricted to protolanguage. |
| The linguistic characteristics of South Caucasian languages indicate descent from a common protolanguage. |
| Here we have to turn to notions of exaptation, for language is a unique aptitude that doesn't seem to have emerged from protolanguage, and certainly did not do so directly. |
