Degree of acceptance of conjugation of verb according to root?

Question

The verb *trasalire* should be conjugated (I report the Indicative present tense) as > Io trasalisco; Tu trasalisci, Egli trasalisce ...But since the verb may be perceived as a composite of *salire*, it is often used with its conjugation:> Io trasalgo; Ti trasali; Egli trasale ...I'm sure this is not the only case of this phenomenon. Do you know to which extent this mechanism of compositional usage of a root is accepted by the speaking community and the official grammars?

Answer 1

trasalisco conjugation is not used anymore, trasalgo, trasali, trasale etc... is the one commonly used i today language