Its not polite to suggest the linguistic relation.
From the economist.com
This occurs even though sign languages generally do not have any linguistic relation to the spoken languages of the lands in which they arise.
From the en.wikipedia.org
Agglutination is a typological feature and does not imply a linguistic relation, but there are some families of agglutinative languages.
From the en.wikipedia.org
In relation to legislation, a causal effect of linguistic rights is language policy.
From the en.wikipedia.org
He also compared the probable linguistic situation with the relation between modern Norwegian and Danish languages.
From the en.wikipedia.org
However, these amalgamations in the Spanish territory did not affect Mirandese, which preserves distinct linguistic differences in relation to both Portuguese and Spanish.
From the en.wikipedia.org
The linguistic situation of the BP informal speech in relation to the standard language is controversial.
From the en.wikipedia.org
Sapir studied the ways in which language and culture influence each other, and he was interested in the relation between linguistic differences, and differences in cultural world views.
From the en.wikipedia.org
But using this linguistic shortcut, you can deduce the meaning of a word based on it relation to a known verb.