Feminization of language
In linguistics, feminization refers to the process of re-classifying nouns and adjectives which as such refer to male beings, including occupational terms, as feminine. This is done most of the time by adding inflectional suffixes denoting a female (such as the standard suffix -ess in English, or its equivalent -a in Spanish).
In some languages with grammatical gender, for example Dutch, there is a tendency to assign the feminine gender to certain – in particular abstract – nouns which are originally masculine or neuter. This also happened to some words in Middle English (which, in contrast to Modern English, had grammatical gender) which denoted virtue and vice. In Modern English, in spite of it being a gender-neutral language, certain non-human things that are usually neuter are still sometimes feminized by way of figure of speech, especially countries and ships (see also Gender in English § Ships, Gender in English § Modern English).
Feminization is also related to neutralization, which is the process of replacing masculine forms of words (i.e. policeman) with gender-unmarked forms (i.e. police officer).
Not to be confused with feminization in sociology, though the two subjects are inter-related.