Some information on how to fix it:
The translation is in \themes\question\inputondemand\survey\questions\answer\multipleshorttext\answer.twig.
The problem is apparently that these twig files (at least the one in /themes/question) are not picked up by the function actionGenerateTwigTmpFiles.

This is a console command to create/compile temporary .php files from the twig files to the twig_cache directory, where they are then picked up by our translation tools.

You can run it this way:

/usr/bin/php application/commands/console.php Twig generateTwigTmpFiles

https://github.com/LimeSurvey/LimeSurvey/pull/2674

Gabriel, please extend generateTwigTmpFiles so it properly creates the tmp files for all twig files..

"Add line" was just an example - I bet there are more strings that are currently not picked up and also this will avoid to have all strings duplicated in a normal PHP file.

Got it! Sorry :)

PR 2674 is replaced by PR 2678, which is a broader and more general solution.

https://github.com/LimeSurvey/LimeSurvey/pull/2678

On some comments in the code, it is mentioned that some twig files may not be reached by the temp rendering process.
Ex: When you have an included inside an if.

An alternative solution for that could be to just scan the twig files and render all of them.
So, instead of rendering the main file and hoping to include the child files, we just render them all.

@c_schmitz : maybe you want to review too ?

Fix committed to master branch: http://bugs.limesurvey.org/plugin.php?page=Source/view&id=33997

I believe this could be a good enhancement for the future:
https://bugs.limesurvey.org/view.php?id=18414#c72366

Also, maybe we can parse question themes XML for translating question attributes as well.
What do you think?

New ticket?

Fixed in Release 5.4.9+221101