In LinguaLibre RecordWizard, when we reach the screen for adding texts we want to record, the possibility to add Lexemes is covered by the "External Tools" section, where you need to add a query for the kind of lexemes you want to add. This is not obvious or easy for most of the users, much less for people from small language communities.
A generator for adding automatically lexemes in the language I have chosen that lack an audio should be added there, making easy to record pronunciation of lexemes.