Assimilation rule: a nasal consonant assimilates to its following consonant concerning its place of articulation. This rule is universal in two respects: it is valid for all nasal consonants and for all languages.
Standardized
When nasal consonants assimilate to a following consonant, then they assimilate in place of articulation (rather than in manner).
Keywords
assimilation, consonant, nasal, place of articulation