It partially shares Anglo-Frisian's (Old Frisian, Old English) Ingvaeonic nasal spirant law which sets it apart from Low Franconian and Irminonic languages, such as Dutch, Luxembourgish and German.

One such difference is the Old Dutch utilization of -a as its plural a-stem noun ending, while Old Saxon and Old English employ -as or -os.

This feature was carried over into the descendant-language of Old Saxon, Middle Low German, where e.g. the adjective krank ('sick, ill') had the comparative forms krenker and kranker.

It kept five out of the six distinct cases of Proto-Germanic: the nominative, accusative, genitive, dative and (Vestigially in the oldest texts) instrumental.

As a result, in Middle Low German, only the former weak n-stem and strong a-stem classes remained.

The Old Saxon verb inflection system reflects an intermediate stage between Old English and Old Dutch, and further Old High German.

Some were simply consequences of the greater level of nominal and verbal inflection – e.g., word order was generally freer.

Only a few texts survive, predominantly baptismal vows the Saxons were required to perform at the behest of Charlemagne.

There is also: A poetic version of the Lord's Prayer in the form of the traditional Germanic alliterative verse is given in Old Saxon below as it appears in the Heliand.