Nomadic tribes of Arabs occasionally made their way into the region undergoing assimilation by the local population.

In Majorcan and Minorcan Catalan, undergoes total assimilation to a following consonant (just as stops do): 'buf gros' ('large puff').

Voicing may also undergo assimilation:

Non-Poles were supposed to be 2nd-class citizens to the moment they underwent language and cultural assimilation.

Despite having undergone major assimilation in their language and religious beliefs, they still identify themselves as Karabağlı and are viewed as a distinct group by the local population.

The Raeti themselves appear to have undergone assimilation, as Livy states that their language (Raetian) had become much corrupted.

The Polish population underwent significant assimilation; in 1989 40% considered Ukrainian as their mother tongue, 15% Russian.

When a sequence of nasal+occlusive falls in contact with another occlusive or a fricative, the first occlusive is completely elided and the nasal undergoes partial assimilation.

An arms smuggler and human representative of The Omar who has not undergone any biomodification or assimilation at all.

This theory also suggests that high frequency words also tend to undergo complete assimilation whereas low frequency do not.