The writing systems of the modern West Germanic languages have many features in common: They are all written using the Modern Roman Alphabet and exhibit a certain depth, that is, in addition to the pure grapheme–phoneme correspondences, prosodic, morphological, and syntactic information that is systematically encoded in their writing systems. A notable exception is the writing system of Yiddish, which is not only written with an alphabet evolved from the Hebrew script but is also almost completely transparent.
Except for Yiddish, all writing systems of modern West Germanic languages use graphematic syllable and foot structures to encode suprasegmental properties such as vowel quantity. Paradigmatic relations are represented by morphological spellings (especially stem and affix constancy). Syntagmatic relations are expressed, for example, in compound spelling, which adheres to the same principles in all writing systems under discussion.
The writing systems of modern West Germanic languages have been studied by grapholinguists in varying depth. While German is probably the best researched writing system in the world, some writing systems, such as Luxembourgish, await thorough grapholinguistic investigation.