I am not 100% sure I’ve completely understood your question, so could you please provide me with more details about what you would like to achieve?
If you would like to see de translations while translating content to de-AT, then this can easily be done by using the setting “Show source string in <target_locale>”. More information about this can be found in our documentation guide here.
Does the above answer your question? If not, then please let me know what I missed and I will be more than happy to provide further clarification
I am referring to when u download the translations.
Like normally when you download de translations, you fallback the empty translations to the source language.
Unfortunately, filling the empty translations with another target language is not supported.
However, if you find this useful, you can get these strings empty instead via our API using the download mode “onlytranslated”. Please note that this is supported for specific file formats (the list can be found here)