| Sprachsystem | Nominativ, Singular | nominative case, singular | |
| Sprachsystem(e)s | Genitiv, Singular | genitive case, singular | |
| Sprachsystem(e) | Dativ, Singular | dative case, singular | |
| Sprachsystem | Akkusativ, Singular | accusative case, singular | |
| Sprachsysteme | Nominativ, Plural | nominative case, plural | |
| Sprachsysteme | Genitiv, Plural | genitive case, plural | |
| Sprachsystemen | Dativ, Plural | dative case, plural | |
| Sprachsysteme | Akkusativ, Plural | accusative case, plural |