Notably, a common to the region shift of ił, il > to -eł, -el/-ył, -yl is absent here.
Otherwise, ęC and ąC tend to decompose to yN and oN, especially in modern times, except before sibilants, where nasality can be retained.
Final -ą often retained nasality, at least historically, in the third person plural present of verbs and in the accusative feminine singular of adjectives, numerals and pronouns.
Final -ą usually decomposes to -om in the instrumental feminine singular of nouns, adjectives, numerals and pronouns.
Prothetic h- may be inserted before other initial vowels including a-, but is usually restricted to particular words.
trz, strz, drz usually simplify to cz, szcz, dż.
Final and pre-sibilant ń often shifts to j and nasalizes the previous vowel.
The archaic -e of feminine genitive singular of soft stems is preserved.
być often takes analytical declensions: jo jest (jestem), sǫmy/my sǫ (jesteśmy), já byó (byłem), my byli (byliśmy).
Certain verb declensions are leveled from r||rz to r||r: bieres (bierzesz), but this is restricted to certain words.