Generally, the greater the contact and exchange that have existed between two languages, or between those languages and a third one, the greater is the ratio of metaphrase to paraphrase that may be used in translating among them. However, due to shifts in ecological niches of words, a common etymology is sometimes misleading as a guide to current meaning in one or the other language. For example, the English actual should not be confused with the cognate French actuel ("present", "current"), the Polish aktualny ("present", "current," "topical," "timely," "feasible"), the Swedish aktuell ("topical", "presently of importance"), the Russian актуальный ("urgent", "topical") or the Dutch actueel.

A greater ratio of metaphrase to paraphrase can be used translating when there as been greater what between languages?