In their examples on github, and in other places, react-i18next seem to suggest that we should use their Trans component by filling it with some kind of text, which to my understanding does not appear in the resulting app in any way since it gets overwritten by the default locale. What's it for? Is it just there to make sure react doesn't optimize away the components?
So after doing some more research, and trying a few suggestions, it seems that the recommended way to use <Trans> is to use the default text as a key in your autogenerated translation files, so
<Trans>Lorem ipsum</Trans>
in your code would give you
{"Lorem ipsum": "Lorem ipsum"}
in your default locale file, which could then be translated like
{"Lorem ipsum": "Löksås yxskaft"}