Problem in Multidomain installation

[patrickdadzio]

Hello,

I have got a TYPO3 installation that serves 2 websites. One is bilingual the other website is not.
Today I tried to translate some content using your extension (which is great btw) and deepl but no luck. It stopped at the last step of the translation wizard showing the idle icon forever.
I checked the console and saw an error 500. When I opened it in a new tab I got the message that the second website (which is a single language site) doesn't have language ID 1.
I was able to fix the problem by adding the second language (ID 1) to the config.yaml of the second website and disabling the language but it would be great if the extension would only use the languages of the current domain / website.