The dialog to create a new translation (T111094) let's user select a page that exists in the selected language in order to be translated. It is important that the page does exist in order for the user to translate it.
However, currently when searching for a non existing page, an option is provided to create such page:
This option does not make sense, and should not be provided.
We can show a message similar to the empty state we considered in T111094#3645856, to communicate that there are no pages for that search. Surfacing the search used and the language in which the user is searching as part of the message can help the user to identify the problem if any (e.g., a typo or searching in the wrong language):