If English is your mother tongue, you write and publish in English. If not, as a rule, you should first write the text in your mother tongue.
If you happen to have the available capacity and/or uncommitted items in your budget, you should also plan an English version in the midterm.
The reason: a text that goes around the world has 10 to 100 times as many readers as a text that does not exist in English.
Furthermore, you can only remove the copyright for other languages if you translate your text into English. It is usually not sufficient to remove the copyright in the native language alone – you are then considerably restricting the circle of possible translators.
Therefore, the road to multilingualism leads via the English version.
The Reference: free medical information